What is the coordination number of magnesium in MgO? The ionic radii of Mg 2+ and O 2- are 72 and 140 pm, respectively.
A) 4
B) 2
C) 8
D) 6
E) 12

Question

Quizplus · Accepted Answer

The coordination number of an ion in a compound is the number of oppositely charged ions surrounding it. In MgO, oxygen has a charge of -2, and magnesium has a charge of +2. This means that each magnesium ion is surrounded by six oxygen ions, and each oxygen ion is surrounded by two magnesium ions. Therefore, the coordination number of magnesium in MgO is 6. The ionic radii provided are not necessary to determine the coordination number in this case.

What Is the Coordination Number of Magnesium in MgO? the Ionic