Chapter 17, Problem 25R

To determine

To Choose: The correct option.

Answer to Problem 25R

Option B

Explanation of Solution

Introduction:

For every ionic bond, the following two conditions must be satisfied.

• Each ion loses or gains electrons to complete its octet.
• Ions will combine in such a way that charges of the ions would balance out.

Atomic number of Magnesium=12

Its electronic arrangement=2,8,2

Thus, to complete octet, it loses two electrons.

Atomic number of Fluorine=9

Its electronic arrangement=2,7

Thus, to complete octet, it requires an electron.

So, one $M{g}^{+2}$ combines with two $F^{-}$ to form $Mg{F}_2.$

The subscript two of fluorine indicates that there are two fluorine atoms that are ionically bonded to magnesium.

Conclusion:

Thus, when the magnesium and fluorine react, the type of the bond which is formed is called ionic bond. Option B is correct.