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14 February, 08:49

What is the electron configuration for a calcium atom?

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Answers (2)
  1. 14 February, 10:33
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    I think it is [Ar] 4s2
  2. 14 February, 11:05
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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
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