Question

The total number of protons, electrons and neutrons in 12 g of C 6(atomic no.) and12 (atomic mass)is -
(A) 1.084 10^25
(B) 6.022 x 10^23
(C) 6.022 × 10^22
(D) 18
​

Answer 1

A) 1.084 * 10^25

atomic mass (C): 12

no of protons:6

no of electrons :6

no of neutrons: (atomic mass) - ( no of protons) = 6

12 g of c contains 1 mole of carbon that is

$6.022 \times {10}^{23}$

hence total no of electrons protons and neutrons in 12 g of c

=

$6.022 \times {10}^{23} \times(6 + 6 + 6)$

$= 1.084 \times {10}^{25}$