Question

Number of atoms in $12$ gm of ${}_6^{12}C$ is:

• A. $6$
• B. $12$
• C. $6.02\times {10}^{23}$
• D. $6\times 6.02\times {10}^{23}$

Answer 1

Answer: (C)

$6.02\times {10}^{23}$

The Avogadro number, which is $6.022\times {10}^{23}$ is defined as the number of atoms in exactly 12 g of ${}_6^{12}C$ (carbon-12). So, we can say that the number of atoms in 12 gm of carbon-12 is $6.022\times {10}^{23}$.