How do you write the electron configuration for calcium?

1 Answer
anor277
Feb 23, 2017

Got a Periodic Table.............? Of course, you have, you are doing your chemistry homework.

Explanation:

For Ca, Z=20. And thus for the neutral atom, we have 20 electrons to distribute:

1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)

How do we write the configuration for Ca^(2+)?

And the abridged form is [Ar]4s^2..............

What about "potassium", and what about for "chlorine"?

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