Q. One atom of an element weights 1.8$\times 10^{- 22}$g. its atomic mass is
A) 29.9
B) 18
C) 108.36
D) 154
Explanation
(c)
Mass of 1 atom = $1.8 \times 10^{- 22}$g
Mass of $6.02 \times 10^{23}$ atoms
$= 6.02 \times 10^{23} \times 1.8 \times 10^{- 22}$g
$= 6.02 \times 1.8 \times 10$g
$= 108.36$g
$\therefore$ Atomic mass of element $= 108.36$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.