Chapter 29, Problem 13CQ

a.

To determine

To identify: The element with $1s^{2}2s^{2}2p^{6}3s^2$ electronic configuration.

b.

To determine

To identify: The elements with $1s^{2}2s^{2}2p^{7}3s$ electronic configuration.

c.

To determine

To identify: The element with $1s^{2}2s^{2}2p^{4}3s^{2}3p^2$ electronic configuration.