Explain with examples (ii) Mass number
It is defined as the sum of protons and neutrons.It is represented by letter “A”.It is almost equal to the atomic mass of an atom.Therefore , it is written as Mass= no protons + no of neutrons.For example: nitrogen has 7 protons and 7 neutrons which is equal to 14. Thus mass of nitrogen is 14. Final Answer It is the sum of protons and neutrons represented by letter “A”. Example: nitrogen.
