Question

What is the mass (in gram) of?

1 atom of sodium?

Answer 1

To calculate the mass of 1 atom of sodium:

Atomic mass of sodium = 23

1 mole of atom = 6.022 × 10²³ (Avogadro’s no.)

Hence, mass of one sodium atom = \(\frac{Atomic\,mass\,of\,a\,mole\,of\,atom}{Avogadro's\,no.}\)

Hence, mass of 1 sodium atom = \(\frac{23}{6.022\times10^{23}}\)

Mass of 1 oxygen atom = 3.81 x 10²³g