Question

What is atomic and mass number??? ​

Answer 1

Answer:

The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.

The mass number is different for each different isotope of a chemical element.

Answer 2

Explanation:

Atomic no - It is a no given to a particular element by its properties ( chemical and physical ) ....

atomic mass - A particular element have its own massto exist in nature called atomic mass of particular atom ....