what are ISOTOPES? explain through an easy example

Isotopes are atoms of the same element that have different number of neutrons. They are still the same element, just a bit bigger.The addition of neutrons would have an impact on the atomic mass.

The word isotope, meaning at the same place, comes from the fact that isotopes are located at the same place on the periodic table.

Isotopes of Hydrogen:
Hydrogen
Deuterium
Tritium

Isotopes of Carbon:
Carbon - 12
Carbon - 13
Carbon - 14

Isotopes of Uranium:
Uranium - 234
Uranium - 235
Uranium - 238

Isotopes of Lithium:
Lithium - 6
Lithium - 7