Question

an ionic bond for calcium and oxygen is cao. if an oxygen ion has a charge of two negative, what is the charge for calcium? +2 -1 +1 -2

Explanation:

Step1: Recall the rule of ionic compounds

In an ionic compound, the sum of the charges of all ions is zero.

Step2: Let the charge of calcium ion be \(x\)

For \(CaO\), there is one \(Ca\) ion and one \(O\) ion. The charge of \(O\) ion is \(- 2\). So, \(x+(-2)=0\).

Step3: Solve for \(x\)

\(x = 2\)

Answer:

+2