Question

Define the terms atomic number and mass number of an element with example

Answer 1

Atomic Number:-
Number of protons of element is atomic number of that element.

For Example: Oxygen has 8 protons, so atomic number of Oxygen is 8.

Mass Number:-
Total number of electrons and protons of element is the mass number of element.

For Example: Oxygen has 8 protons and 8 electrons, so mass number of Oxygen is (8+8) 16 .