# Question #4f5b1

Dec 5, 2017

To find the number of nucleons present in an atom find the molar mass{Nucleon number} of the atom.

Mass of one atom$\Rightarrow 3.32 \times {10}^{-} 23$g

Molar mass of atom$=$mass of one atom$\times$Avogadro number $= 3.32 \times {10}^{-} 23$gm$\times$6.022$\times {10}^{23}$

$= 19.9931 \approx$20$\frac{g}{\text{mole}}$

No. of nucleons present in 1 atom :20

Therefore No. of nucleons present in 2 atom: 40