Question

What can you say about the occurrence and isotopes of hydrogen?

Answer 1

The isotopes of hydrogen occur naturally.
The isotopes of hydrogen are 1H,2H & 3H
         1H-Protium , 2H-Droitrium and 3H-Tritium ..

Answer 2

Hydrogen is the most abundant gas present in this universe.On earth it is found in less amount on gaseous state but it found in large quantity in form of water(H2O).
There are 3 isotopes of hydrogen -
1. Protium - ₁H¹
2. Deuterium - ₁H²
3 Tritium - ₁H³