Question

What is meant by atomic mass number explain how the item ek number and mass number of carbon are 6 and 12 respectively

Answer 1

Here is the answer-

Mass number refers to the total mass of the element. Since the mass of electrons are negligible, the mass of an element is often taken as the sum of number of protons and neutrons. It is denoted by letter A. Carbon has 6 protons, 6 electrons and 6 neutrons. So the atomic number is 6 as the number of protons is 6.