SOLUTION

• Tritium is a rarer isotope of hydrogen.
• It radiates β-particle.
• Its atomic number is 1, and its mass number is 3. Represented by ₁H³.
• The half-life of Tritium is 12.4 years.

 1H3 → ₂He³ + _-1β⁰

So, the Radioactive disintegration of Tritium gives β particles.