Question

Help me please (゜_゜;​

Answer 1

#1

• Tritium

Chemical symbol is

`\\ \rm\rightarrowtail _1^3H`

• As per instability in nucleus it is unstable so it decays beta particles.

#2

Its Deuterium

• D_2 O or heavy water is used in nuclear reactors

Answer 2

• Tritium is the isotope of hydrogen which is radioactive.

• Deuterium is the isotope of hydrogen which contains equal number of protons and neutrons.