Question

count the atoms! f₃no₂s

Explanation:

Step1: Count fluorine atoms

There are 3 fluorine (F) atoms as indicated by the sub - script 3.

Step2: Count nitrogen atoms

There is 1 nitrogen (N) atom (no sub - script means 1).

Step3: Count oxygen atoms

There are 2 oxygen (O) atoms as indicated by the sub - script 2.

Step4: Count sulfur atoms

There is 1 sulfur (S) atom (no sub - script means 1).

Step5: Calculate total atoms

Add up the number of each type of atom: $3 + 1+2 + 1=7$.

Answer:

7