Question

Sum of number of protons, electrons and neutrons
in 12g of "C is :-
(1) 1.8
(2) 12.044 x 1023
(3) 1.084 x 1025
(4) 10.84 x 1023​

Answer 1

Hi there,

The answer is (3)

Key :

one mole contains 6.02× 10^23 atom carbon

Sum of particles in carbon atom are 18 which are

6 protons+ 6 neutrons + 6 electrons

Atomic mass of carbon = 12

Sample mass of carbon = 12

☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

♤ One mole =

sample mass ÷ atomic mass

12 ÷ 12 = 1 mol

♤ Number of atoms = 1×6.02×10^23

♤ Number of particles =

6.02×10^23×18= 1.084×10^25

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