The neutron has a mean square radius of about 0.81015 m, or 0.8 fm, and it is a spin- fermion. .ec_product_type1 .ec_product_addtocart:hover{ background-color:#666666; border-bottom-color:#222222; } Ungraded . Mg: 0 0? Cerium-140 is composed of 58 protons, 82 neutrons, and 58 electrons. .ec_product_li, li.ec_product_li{ width:50%; } There are 38 positively charged particles in its nucleus. In the middle is the letter symbol for the element (e.g., H). Neutrons stabilize the nucleus, because they attract each other and protons , which helps offset the electrical repulsion between protons. Post .ec_details_mobile_title_area{ display:block; } I. 2). Isotopes are nuclides that have the same atomic number and are therefore the same element, but differ in the number of neutrons. window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/12.0.0-1\/72x72\/","ext":".png","svgUrl":"https:\/\/s.w.org\/images\/core\/emoji\/12.0.0-1\/svg\/","svgExt":".svg","source":{"concatemoji":"https:\/\/www.excelsalesconsulting.com\/wp-includes\/js\/wp-emoji-release.min.js?ver=5.3.6"}}; The electron configuration can be visualized as the core electrons, equivalent to thenoble gasof the preceding period, and the valence electrons (e.g. For a number to be classified as a prime number, it should have exactly two factors. .ec_image_container_none, .ec_image_container_none > div, .ec_image_container_border, .ec_image_container_border > div, .ec_image_container_shadow, .ec_image_container_shadow > div{ min-height:310px; height:310px; } Copyright 2023 Periodic Table | All Rights Reserved |, Consuming 75% of production, the primary use for strontium was in, Krypton Protons Neutrons Electrons Electron Configuration, Yttrium Protons Neutrons Electrons Electron Configuration. Q:Fill in the gaps in the following table, assuming each columnrepresents a neutral atom. Like with what we mesure if carbon- 14 ,potassium-40 and uranium-235 concentration test fails ? " It was a good course. Oh noes! .ec_cart_widget_minicart_wrap{ background:#222222; } ), and 38 electrons (necessarily), and has generally 48, 49, or 50 neutrons depending on the isotope. These are in fact very reliable :-). Relevance. Copyright 2019 Excel Sales Consulting Inc. It could be part of the main body, but then the periodic table would be rather long and cumbersome. of proton = 19 Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. 40 number of boron- 10 = 1, Q:Fill in the gaps in the following table, assuming each column An element that is not combined with any other different elements has an oxidation state of 0. @media only screen and ( min-width:1140px ){ .ec_quickview_view_details a{ color:#222222 !important; } .ec_price_container_type5:after{ border-color: #666666 transparent transparent #666666; } .ec_category_li:nth-child( 2n+1 ){ clear:both; } Electrons are one of three main types of particles that make up atoms. The current IUPAC Gold Book definition of oxidation state is: Oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds. 81 235. Since the number of electrons and their arrangement are responsible for the chemical behavior of atoms, theatomic numberidentifies the various chemical elements. But what exactly does it mean for something to be radioactive? Iron-55 (55 Fe) is a radioactive isotope of iron with a nucleus containing 26 protons and 29 neutrons. Symbol (An atomic mass unit equals about \(1.67 \times 10^{-27}\) kilograms.) Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus. Strontium has 38 protons (necessarily! 46 116 120 " Great class. 17 In a neutral atom, the number of protons equals This property can be used to date formerly living objects such as old bones or wood. Therefore, an argon atom has eighteen protons and eighteen electrons. I am thankful to work for a company that is willing to send me to a quality training course. ", The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom. " Was a good pace, interesting, fun and seemed to fly by quickly. ", vertical-align: -0.1em !important; " Gave a lot of insight on things we dont really think about improving and should. ", .ec_product_details_page a{ color:#222222; } #ec_cart_payment_one_column{ display:block; } For example, silicon has nine possible integer oxidation states from 4 to +4, but only -4, 0 and +4 are common oxidation states. It could be part of the main body, but then the periodic table would be rather long and cumbersome. The time at which half of the original carbon-14 has decayedand half still remainsis designated as t 1/2. Tb159 The difference between the neutron number and the atomic number is known as theneutron excess: D = N Z = A 2Z. , A:Given Our videos prepare you to succeed in your college classes. How do I determine the molecular shape of a molecule? .ec_product_li:nth-child( 2n+1 ){ clear:both; } Timolin Holness. , how many protons and neutrons are present in a, Q:Fill in the gaps in the following table,assuming each column represent a neutral atoms. 112 Many other rare types of decay, such as spontaneous fission or neutron emission are known. Atoms of all elementsexcept for most atoms of hydrogenhave neutrons in their nucleus. Midwest Industries X95, /* ]]> */ Electrons are a type of subatomic particle with a negative charge. " The class is very easy to relate to my own personal experiences & it makes it easy to see how to change for the better! ", Which adjective used twice in the opening paragraph gives the reader the central clues to the woman's appearance. CI .ec_details_customer_review_date > strong{ color:#222222; } WN 2) Which properties are valid for sodium, sulfur, aluminum, & phosphorus? 52 Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. #ec_current_media_size{ max-width:767px; } " Very informative, not just a re-hash of other sales systems. ", http://science.howstuffworks.com/environmental/earth/geology/dinosaur-bone-age1.htm. ), and 38 electrons (necessarily), and has generally 48, 49, or 50 neutrons depending on the isotope. .ec_account_order_item_buy_button, .ec_account_order_item_download_button{ background-color:#222222; } .ec_details_stock_total{ color:#666666 !important; } .ec_product_li:nth-child( 2n+1 ){ clear:both; } .ec_category_li{ width:50%; } Stronitium-90 is composed of 38 protons, 52 neutrons, and 38 electrons. .ec_details_model_number{ color:#666666 !important; } and 15CI in 20%. For example, potassium-40 has a half-life of 1.25 billion years, and uranium-235 has a half-life of about 700 million years and has been used to measure the age of moon rocks, Posted 8 years ago. Nickel-58 is the most abundant isotope of nickel, making up 68.077% of the natural abundance. 99 Isotope:54Fe;56Fe;57Fe;58Fe #navigation_bar > ul > li > a {font-family:"Droid Sans";}#footer {background-color: rgba(255,255,255, 0.3);} @media only screen and ( min-width:768px ) and ( max-width:989px ) { .ec_product_type6 .ec_product_meta_type6 .ec_product_addtocart_container{ float:none; } It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. In Ge-70, there are 38 neutrons (70 - 32 = 38). The number of electrons in each elements electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. The electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. .ec_product_li:nth-child( 1n+1 ){ clear:both; } 206pb How do protons determine the properties of an atom? We and our partners use cookies to Store and/or access information on a device. a.more-link, Unstable isotopesdecay through various radioactive decay pathways, most commonly alpha decay, beta decay, or electron capture. Experimente am Kamiokande lassen auf eine Halbwertzeit von mindestens 1032 Jahren schlieen. symbol 112Cd Protons 38 92 neutrons 58 49 electrons 38 36 mass No. This force of attraction keeps electrons constantly moving through the otherwise empty space around the nucleus. Kentucky Nickel Tax, These two alternate forms of carbon are isotopes. On the basis of this fraction, the age of the material can be calculated with accuracy if it is not much older than about 50,000 years. " Presented in a way we could relate to. ", Symbol, Q:Symbol 159Tb Atomic mass units (\(\text{amu}\)) are useful, because, as you can see, the mass of a proton and the mass of a neutron are almost exactly \(1\) in this unit system. Joined: 31-12-2004 21:38. How is possible carbon 14 atom convert to nitrogen 14 gradually ? #""^86Sr#, #""^87Sr#, #""^88Sr#, isotopes are common. No, 38 is not a prime number. .ec_category_li:nth-child( 1n+1 ){ clear:both; } .ec_details_customer_reviews_left > h3{ color:#222222 !important; } XZA Feel free to ask a question, leave feedback or take a look at one of our articles. .ec_product_li:nth-child( 2n+1 ){ clear:both; } At the upper left is the atomic number, or number of protons. Table \(\PageIndex{1}\) gives the properties and locations of electrons, protons, and neutrons. Why is the number of protons and electrons equal in an atom? A typical composition includes approximately 55% cerium, 25% lanthanum, and 15-18% neodymium with other rare earth metals following. We have also distinguish between the possible and common oxidation states of every element. 0% average accuracy. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Our Website follows all legal requirements to protect your privacy. 46 76. In the periodic table, the elements are listed in order of increasing atomic number Z. Electron configuration ofCeriumis[Xe] 4f15d16s2. Nickel-60 is composed of 28 protons, 32 neutrons, and 28 electrons. by supamom 11-03-2005 17:51, Post Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. Oxidation states are typically represented by integers which may be positive, zero, or negative. 42 Symbol .ec_product_page_sort > .ec_product_page_showing{ color:#222222; } Other elements have isotopes with different half lives, and can thus be used to measure age on different timescales. .ec_cart_page a, .ec_restricted a{ color:#222222; } #ec_current_media_size{ max-width:1300px; } For example, silicon has nine possible integer oxidation states from 4 to +4, but only -4, 0 and +4 are common oxidation states. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z 1) negative electrons in the atom. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Report an issue . So when someone says they carbon date a fossil and say it is 1 billion years old, because C-14 has a half-life of 5,730 years, they used K-40 and not C-14? If a neutral atom has 1 proton, it must have 1 electron. Strontium has atomic number of 38, that means, it has 38 electrons, 38 protons and 38 neutrons. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. Mass number .ec_category_li{ width:50%; } 3+ .ec_category_li{ width:50%; } The positive charge on a proton is equal in magnitude to the negative charge on an electron. Symbol Three neutron sources ( 3, 4, 5), using lowenergy protons and lithium target, provide neutron flux with a narrower energy distribution and a smaller contribution of thermal and fast neutrons, which is important for the quality of therapy. i: 1, 70 Super Class. ", Li: Dies passt genau damit zusammen dass ein Proton aus zwei Quarks mit elektrischer Ladung +2/3 (genannt Up Quarks) und einem mit elektrischer Ladung -1/3 (genannt Down Quark) besteht und ein Neutron aus zwei Down Quarks und einem Up Quark. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. It is thePauli exclusion principlethat requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. Ceriumis a chemical element with atomic number58 which means there are 58 protons in its nucleus. What is the Atomic Mass Number of the element mentioned above . 63 neutrons .ec_details_swatches{ float:left; width:100%; } " Brings you back to basics! In the universe, neutrons are abundant, making upmore than halfof all visible matter. 112 d, Q:Phosphorus-32 is often used to image biological tissue. These two forces compete, leading to various stability of nuclei. How many electrons would it take to equal the mass of a helium nucleus? .ec_product_type3 .ec_product_addtocart:hover{ background-color:#666666 !important; } Norm breaks it down and makes the possibilities endless. ", We already learned that J. J. Thomson discovered a negatively charged particle, called the electron. The number of electrons in each elements electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. The number of protons is always the same in atoms of the same element. Research in high-energy particle physics in the 20th century revealed that neither the neutron nor the protonis notthe smallest building block of matter. 35Br- " I now have a very clear understanding of the sales process. Yes, since 38 has more than two factors i.e. We realize that the basics in the materials science can help people to understand many common problems. I thought it was great and was very informative funny as hell at times also! ", Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z 1) negative electrons in the atom. 1, 2, 19, 38, it is not a prime number. Is 38 a prime number? If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number. .ec_details_price > .ec_product_sale_price{ color:#000000; } .recentcomments a{display:inline !important;padding:0 !important;margin:0 !important;} .ec_product_li:nth-child( 1n+1 ) .ec_product_editor{ left:227px; } You can see details. Mass Number 81 This fact has key implications for the building up of the periodic table of elements. 30 38 Which of, Q:Name the following compounds or formulas: Titanium (V) chloride. .ec_show_two_column_only{ display:none !important; } Complete the following table. .wpb_animate_when_almost_visible { opacity: 1; }. . One of the most stable types of potassium atoms has the mass number 39. Element Symbol Ag 36 " So much information, and I can use all of it. .tags, 65 .ec_out_of_stock_notify{ border-color:#222222; } I'm really just checking to see if I understand this correctly. Every solid,, Q:The smallest unit of charge is 1.6 1019 C, which is the charge in coulombs of a single electron., A:In the given question we have to find out the values of possible charge of oil droplets. Symbol Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. .ec_cartitem_title{ color:#222222 !important; } It was engaging and I think more people should do it. ", .ec_product_type6 .ec_product_meta_type6{ position:relative; width:100%; max-width:100%; margin-left:0; float:none; padding:15px; } .ec_cart_button_row > .ec_account_button:hover{ background-color:#666666 !important; } 52, Q:Consider an ion: 123 X3+. # Neutrons Mass numbers of typical isotopes of Ceriumare140, 142. C. Compound If you were to inject the chemical compounds of an apple into a person body with a needle what effect could it have on the person. Example - 71 is a prime number and it can be written as 71 = 6 12 - 1. .ec_cart_left{ width:100%; padding-right:0px; border-right:0px; } .ec_details_tab.ec_active{ border-top-color:#222222; } The difference between the neutron number and the atomic number is known as theneutron excess: D = N Z = A 2Z. Mark any/all that apply to phosphorus-32. Number of Neutrons = 65 - 30 = 35. Fill in the blanks to complete the table. Only strontium (Sr) atoms can have 38 protons. Stronium with 31 Protons and 37 Neutrons How many protons and neutrons does Strontium 90 have? Co RBX Junior Member Posts: 3 Joined: 05-07-2006 21:15. Transcribed Image Text: Symbol 112 Cd Protons 38 92 Neutrons 58 49 Electrons 38 36 Mass no. .ec_quickview_view_details a:hover{ color:#666666 !important; } # Protons For example, carbon is normally present in the atmosphere in the form of gases like carbon dioxide, and it exists in three isotopic forms: carbon-12 and carbon-13, which are stable, and carbon-14, which is radioactive. {color:#808080;}.breadcrumb a Research in high-energy particle physics in the 20th century revealed that neither the neutron nor the protonis notthe smallest building block of matter. How do you calculate the ideal gas law constant? Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. .ec_product_li:nth-child( 2n+1 ) .ec_product_editor{ left:227px; } Deamn Save Me Lyrics. 208 Multiple-choice. Describe the locations, charges, and masses of the three main subatomic particles. .ec_product_li:nth-child( 1n+1 ) .ec_product_editor{ left:227px; } Main purpose of this project is tohelp the public to learn some interesting and important information about chemical elements and many common materials. Neutron = 39 - 19 = 20, Q:110. Share. For example, carbon has nine possible integer oxidation states from 4 to +4. Who is the longest reigning WWE Champion of all time? } .ec_categorywidget a:hover, .ec_manufacturer_widget a:hover, .ec_pricepoint_widget a:hover, .ec_group_widget a:hover, .ec_cartwidget a:hover{ color:#666666 !important; } Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Direct link to Pharm's post How is possible carbon 14, Posted 7 years ago. He makes the course easy to understand and gives positive attitude. ", [CDATA[ */ It has the highest ratio of protons to neutrons (proton excess) of any known doubly magic nuclide. 26217 views 36. The atomic number is the number on the periodic table, and is always equal to the number of protons. 140Ce is the most common isotope, having a natural abundance of approximately 88%. " I can see where this can be adapted to all areas of life. ", What is the symbol for, A:16proton 18neutron 18electron ion is The ordering of the electrons in the ground state of multielectron atoms, starts with the lowest energy state (ground state) and moves progressively from there up the energy scale until each of the atoms electrons has been assigned a unique set of quantum numbers. They are a type of fundamental particle called leptons. .ec_product_quickview_content_quantity .ec_minus, .ec_product_quickview_content_quantity .ec_plus{ background-color:#222222; } The periodic table is a tabular display of the chemical elements organized on the basis of their atomic numbers, electron configurations, and chemical properties. 58.6934 atomic mass units: Number of Protons: 28: Number of Neutrons: 31: Number of Electrons: 28: Also asked, what has 32 protons and 38 neutrons? # Protons Inside Sales and Customer Service Training. H: strontium. A proton is another one of three main particles that make up the atom. The amount of carbon-14 decreases exponentially with time. 70%. It shows the electron as a particle orbiting the nucleus, similar to the way that planets orbit the sun. I will apply it everyday in my personal and work life. ", Its electron configuration would be 1s 2 2s 2 2p 2. PROBLEM 2.2. Dalton's Atomic Theory explained a lot about matter, chemicals, and chemical reactions. Q:How many protons and neutrons are in37Cl? by robodude 14-06-2010 03:06, Post } .ec_category_li{ width:50%; } {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://www.excelsalesconsulting.com/#organization","url":"https://www.excelsalesconsulting.com/","name":"Excel Sales Consulting","sameAs":[]},{"@type":"WebSite","@id":"https://www.excelsalesconsulting.com/#website","url":"https://www.excelsalesconsulting.com/","name":"Excel Sales Consulting","publisher":{"@id":"https://www.excelsalesconsulting.com/#organization"}},{"@type":"WebPage","@id":"https://www.excelsalesconsulting.com/a35pwqle/#webpage","url":"https://www.excelsalesconsulting.com/a35pwqle/","inLanguage":"en-US","name":"38 protons 58 neutrons","isPartOf":{"@id":"https://www.excelsalesconsulting.com/#website"},"datePublished":"2021-02-16T02:40:53+00:00","dateModified":"2021-02-16T02:40:53+00:00"},{"@type":"Article","@id":"https://www.excelsalesconsulting.com/a35pwqle/#article","isPartOf":{"@id":"https://www.excelsalesconsulting.com/a35pwqle/#webpage"},"author":{"@id":"https://www.excelsalesconsulting.com/author/#author"},"headline":"38 protons 58 neutrons","datePublished":"2021-02-16T02:40:53+00:00","dateModified":"2021-02-16T02:40:53+00:00","commentCount":0,"mainEntityOfPage":{"@id":"https://www.excelsalesconsulting.com/a35pwqle/#webpage"},"publisher":{"@id":"https://www.excelsalesconsulting.com/#organization"},"articleSection":"Uncategorized"},{"@type":"Person","@id":"#person","name":"admin","sameAs":[],"image":{"@type":"ImageObject","@id":"https://www.excelsalesconsulting.com/#personlogo","url":"https://secure.gravatar.com/avatar/99815111078f0ee26a87fd081bb6b614?s=96&d=mm&r=g","width":96,"height":96,"caption":"admin"}}]} #ec_current_media_size{ max-width:989px; } Neutrons = Mass number - Protons#= 88 - 38 = 50#, 12462 views Protons and Neutrons in Cerium. It hasa positive electric charge (+1e)and a rest mass equal to 1.67262 1027kg (938.272 MeV/c2) marginally lighter than that of the neutron but nearly 1836 times greater than that of the electron. A neutral atom of Carbon-12 contains six protons, six neutrons, and six electrons; therefore, it has a mass number of 12 (six protons plus six neutrons). Red Spots In Washing Machine, Manage Settings document.getElementById('quoterotator').innerHTML="No Quotes Found"; .ec_details_add_to_cart_area > .ec_details_quantity > .ec_minus, .ec_details_add_to_cart_area > .ec_details_quantity > .ec_plus, .ec_details_add_to_cart_area > .ec_details_add_to_cart > input, .ec_details_add_to_cart_area > .ec_details_add_to_cart > a, .ec_details_customer_reviews_row > input[type="button"], .ec_details_inquiry_popup_main > form > .ec_details_add_to_cart input, .ec_details_inquiry_popup_main > form > .ec_details_add_to_cart > a, .wpeasycart-html-swatch{ background-color:#222222 !important; } Calculate atomic number, atomic mass, and charge by using mathematical expressions (4-6 If an atom has four protons four neutrons and four electrons its approximate mass number would be 8. The atoms contain three subatomic particles: protons, neutrons and electrons. Transcribed image text: (38) The protons, electrons, and neutrons are collectively referred to as: A) molecules B) subatomie particles C) the smallest particles of an element . " Improved coaching ability - a standard to hold staff accountable to. ", you can always identify an element by it's atomic number (number of protons), this would be Sr. this would be an isotope of Sr though. It hasno electric chargeand a rest mass equal to 1.67493 1027 kgmarginally greater than that of the proton but nearly 1839 times greater than that of the electron. " [Norm was] well prepared, lively, funny, entertaining. ", Most Expensive White Fish To Eat, .ec_details_swatches > li.ec_selected > img{ border:2px solid #222222; } There are 38 positively charged particles in its nucleus. Write the symbol for each of the following ions: (a) the ion with a 3+ charge, 28 electrons, and a mass number of 71. How do you find density in the ideal gas law? Strontium has 38 protons, 50 neutrons and 38 electrons: 39: Yttrium: Yttrium has 39 protons, 50 neutrons and 39 electrons: 40: Zirconium: Zirconium has 40 protons, 51 neutrons and 40 . " Very worthwhile. img.wp-smiley, Direct link to Gerry Lennox's post I'm really just checking , Posted 8 years ago. The information contained in this website is for general information purposes only. Cerium is an important component of mischmetal alloy. " This course has given me the knowledge to achieve and make a great difference in my goal to become a successful salesman for my company! ", Pages 78 This preview shows page 23 - 35 out of 78 pages. 112, A:For an atom, Neutrons 34 53 The best-known use for this alloy is in flints for cigarette lighters. 5 pts. The atomic mass is a , Posted 7 years ago. " Norms approach makes selling easier. So I think I know what 'thing' i'm supposed to be looking through but after trying all the more obvious selections I chose a not so obvious answer and got routed to level 41 Could I PM someone to see if I'm even on the right track. Determine the number of protons and electrons in an atom. (a.addEventListener("DOMContentLoaded",n,!1),e.addEventListener("load",n,!1)):(e.attachEvent("onload",n),a.attachEvent("onreadystatechange",function(){"complete"===a.readyState&&t.readyCallback()})),(r=t.source||{}).concatemoji?d(r.concatemoji):r.wpemoji&&r.twemoji&&(d(r.twemoji),d(r.wpemoji)))}(window,document,window._wpemojiSettings); The total number ofneutronsin the nucleus of an atom is called theneutronnumberof the atom and is given thesymbol N. Neutronnumber plusatomic numberequals atomic mass number:N+Z=A. How long will the footprints on the moon last? .ec_product_type1 .ec_product_addtocart{ background-color:#222222; border-bottom-color:#666666; } .ec_cart_right > .ec_cart_header.ec_top{ margin-top:15px; } 34 76 by Akik0 18-07-2009 17:52, Post Which element has 38 protons and 50 neutrons 7 What is its mass number 8 What. .ec_product_star_off:before{ border-bottom-color:#CCCCCC; } 19 Ag2SO3., Q:Isotope #3 .ec_out_of_stock_notify_button > input:hover{ background-color:#666666; } .ec_details_related_products_area > h3{ color:#222222 !important; } I am refreshed and ready to make changes. ", " /> A prime number is divisible only by 1 and itself, which means it has no other divisor except 1 and the number itself. Atomic Number 35 .ec_search_widget input[type="submit"], .ec_newsletter_widget input[type="submit"], input[type="submit"].ec_login_widget_button{ background-color:#222222; border-bottom:4px solid #666666; } the element Strontium-90 has 38. Electrons The correct answer for the given question is 20 neutrons. .ec_details_tabs{ color:#222222; } For strontium, Z = 38. For instance, a small amount of carbon exists in the atmosphere as radioactive carbon-14, and the amount of carbon-14 found in fossils allows paleontologists to determine their age.
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