Define the following:
(a) Atomic number
(b) Atomic mass
(c) Isobars.
a. Atomic number:
The number of protons present in an atom is called its atomic number. It is represented by the symbol: Z.
b. Atomic mass:
Atomic mass is the sum of the total number of protons and neutrons present in the nucleus of an atom.
c. Isobars:
Isobars are the atoms of different elements having a different atomic number but the same mass number.