Answer:
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

Isotopes of Neon:
Neon - 20
Neon - 21
Neon - 22

Isotopes of Magnesium:
Magnesium - 24
Magnesium - 25
Magnesium - 26

There are many many other isotopes.
First answer by ID1129386924. Last edit by Betaclamp. Contributor trust: 107 [recommend contributor recommended]. Question popularity: 0 [recommend question].