Question

pb(no3)2
pb: ________
n: ________
o: ________
total: ________

Explanation:

Step1: Determine the number of each element

In the formula $Pb(NO_3)_2$, the sub - script outside the parentheses applies to all elements inside the parentheses. There is 1 lead (Pb) atom. For nitrogen (N), since there is a sub - script 2 outside the parentheses and 1 N in $NO_3$, the number of N atoms is $2\times1 = 2$. For oxygen (O), there are 3 O atoms in $NO_3$ and a sub - script 2 outside the parentheses, so the number of O atoms is $2\times3=6$.

Step2: Calculate the total number of atoms

The total number of atoms is the sum of the number of Pb, N, and O atoms. So, $1 + 2+6=9$.

Answer:

Pb: 1
N: 2
O: 6
Total: 9