Which isotope of hydrogen is radioactive?

ہائیڈروجن کا کون سا آاسوٹوپ تابکار ہے؟

Tritium

Protium

Deuterium

None of these

Tritium (³H) is the only radioactive isotope of hydrogen, emitting beta radiation.

It has one proton and two neutrons, making it unstable and radioactive.