Page 121 - MATERIAL SCIENCE AND ENGINEERING PART 1

Let’s practice an example by combining

calcium and phosphorus:

Calcium has a charge

of Ca . Phosphorous Ca P
2+

3-
has a charge of P . To
bond these two ions

together, their charges

must be equal and

opposite. Therefore, Ca P

three Ca ions are
2+
needed to balance with

3-
two P in order to

balance their charges (2.8.5)

for the molecule Ca P . Ca
3 2

(2.8.8.2)

106

Politeknik Ibrahim Sultan