Question

how many ions that have a +1 charge will bond with an ion that has a -2 charge?
one
two
three
four

Explanation:

Step1: Determine charge - balance principle

In a compound, the total positive charge must equal the total negative charge for electrical neutrality.

Step2: Calculate the number of + 1 - charged ions

Let the number of + 1 - charged ions be $n$. The charge of a - 2 - charged ion is - 2. We need $n\times(+1)+(-2)=0$. Solving for $n$, we get $n = 2$.

Answer:

B. two