In which Isotopes of hydrogen there are 1 proton and 2 neutron?

In which Isotopes of hydrogen there are 1 proton and 2 neutron?

ہائیڈروجن کے کن آئسوٹوپس میں 1 پروٹون اور 2 نیوٹران ہوتے ہیں؟
Explanation

Tritium is an isotope of hydrogen that is composed of one proton, two neutrons, and one electron.

The symbol for tritium is 3^H.

The atomic number of tritium is 1 

the atomic mass of tritium is 3.

NA21-8-2023