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What is the electron configuration for a calcium atom?

User Mlaccetti
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2 Answers

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I think it is [Ar] 4s2
User Nexii Malthus
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i believe its (AR) 4rs . because calcuium is a chemical element with symbol Ca and atomic number 20. which calcium is soft gray group 2 alkaline earth metal, which is earths fifth most abundant element by mass in earth's crust
User Bill Eisenhauer
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