Question

To format the electron configuration correctly make sure to superscript where needed, do not add spaces to your answer and italics are not possible in this module. Write the ground-state electron configuration for calcium, Ca. You may write either the full or condensed electron configuration.

Answer 1

Answer:

$1s^{2}2s^{2} 2p^{6}3sx^{2}3p^{6} 4s^{2}$  [full configuration]

Explanation:

Calcium has 20 electrons in its nucleus, and by virtue of its position on the periodic table (fourth row, second column), it is an s-block element with its entire lower orbital filled. it has two valence electrons.

Therefore, its configuration is:

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

To condense this, you can utilize Argon's stable configuration before $4s^{2}$ to show that all orbitals before 4s are filled.

I hope this was helpful.