Question

An element has same number of neutrons as total number of protons or total number of electron what will be the neutron excess

Answer 1

NUMBER OF NEUTRON = MASS NO. - NO . OF PROTON

EX: In C-12 isotope

mass = 12 , no. of proton = 6

no. of neutron = 12 - 6 =6

BUT,

In C-14 isotope of carbon

mass = 14 , no of proton = 6

no. of neutron = 14–6 = 8