how many atoms of nitrogen are in the chemical formula ni(no₃)₂?\no 2\no 1\no 6\no 3

Answer:

A. 2

Explanation:

Step1: Analyze the formula

The formula is $\text{Ni}(\text{NO}_3)_2$.

Step2: Identify nitrogen - containing part

The part with nitrogen is $\text{NO}_3$. There are 2 $\text{NO}_3$ groups.

Step3: Count nitrogen atoms

Each $\text{NO}_3$ group has 1 nitrogen atom. So with 2 $\text{NO}_3$ groups, there are 2 nitrogen atoms.