Question

sum of number of proton,neutron and electron in 12g of carbon atom is

Answer 1

Dear Student



Mass of C = 12g

No. of moles = $\frac{Mass}{MolarMass}=\frac{12g}{12g/mol}=1mol$


Therefore, 12 g of C will have 6.022 x 10²³ atoms


We know, Atomic Number = No. of Protons

So, No. of Protons = 6


Now, No. of Electrons = No. of Protons = 6

Mass Number = No. of (Protons+ Neutrons)

No. of Neutrons = Mass Number - No. of Protons = 12 - 6 = 6

Therefore, it has 6 each of electrons, protons and neutrons


Therefore,
No. of Electrons in 12g of C atoms = 6 x 6.022 x 10²³ = 36.132 x 10²³

No. of Protrons in 12g of C atoms = 6 x 6.022 x 10²³ = 36.132 x 10²³

No. of Neutrons in 12g of C atoms = 6 x 6.022 x 10²³ = 36.132 x 10²³


So, the sum of Protons, Neutrons and Electrons = 3 x (36.132 x 10²³)

= 108.396 x 10²³ or 1.084 x 10²⁵



Regards