Isotopes are defined as the atoms of the same element, having the same atomic number but different mass numbers.For example, Hydrogen
1
H has three naturally occurring isotopes
1
H,
2
H, and
3
H .
Explanation:
From the above explanation, we can see that isotope of any material have different atomic mass i.e., number of nucleons are different but the number of protons is the same
From the above periodic table, we can see that carbon has 12 nucleons i.e., 6 protons and 6 neutrons.
Whereas Carbon-14 is one of the isotopes of carbon in which is used for carbon dating