Chapter 7, Problem 19QP

Group the following electron configurations in pairs that would represent elements with similar chemical properties:

(a)

$1s^{2}2s^{2}2p^5$

(b)

$1s^{2}2s^1$

(c)

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

(d)

$1s^{2}2s^{2}2p^{6}3s^{2}3p^5$

(e)

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

(f)

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^6$