Answer to Question #241800 in General Chemistry for Alex

Question

The electronic configuration of four atoms are as follows.

A - 2, 8, 2

B - 2, 4

C - 2, 8, 7

D - 2, 8, 8

Which pair will form an ionic bond?

Select one:

a.
B and D


b.
A and D


c.
B and C


d.
A and C

Answer 1

Magnesium (Mg) has the electron arrangement 2,8,2.

To become stable it must lose its two outer electrons to obtain a full outer energy level.

Non-metals form negative ions because they gain electrons to become stable.

Chlorine (Cl) has an electron arrangement 2,8,7.

To become stable it must gain an electron to obtain a full outer energy level.

Answer: d. A and C