To determine the number of nitrogen atoms in the chemical formula [tex]\( Ni(NO_3)_2 \)[/tex], follow these steps:
1. Identify the number of NO[tex]\(_3\)[/tex] groups in the formula:
- The subscript 2 outside the parentheses indicates that there are two NO[tex]\(_3\)[/tex] groups.
2. Determine the number of nitrogen atoms in one NO[tex]\(_3\)[/tex] group:
- Each NO[tex]\(_3\)[/tex] group contains one nitrogen atom.
3. Calculate the total number of nitrogen atoms:
- Since there are two NO[tex]\(_3\)[/tex] groups and each contains one nitrogen atom, the total number of nitrogen atoms is:
[tex]\[
1 \text{ nitrogen atom/group} \times 2 \text{ NO}_3 \text{ groups} = 2 \text{ nitrogen atoms}
\][/tex]
Therefore, the number of nitrogen atoms in the chemical formula [tex]\( Ni(NO_3)_2 \)[/tex] is 2.
