How do you write the electron configuration for calcium?

Feb 23, 2017

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

Explanation:

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

$1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{2}$

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

And the abridged form is $\left[A r\right] 4 {s}^{2.} \ldots \ldots \ldots \ldots .$

What about $\text{potassium}$, and what about for $\text{chlorine}$?