Tritium, 3H, is radioactive and decays by electron emission. Its half-life is 12.5 yr. In ordinary water the ratio of 1H to 3H atoms is 1.0 × 1017 to 1.
(a) Write a balanced nuclear equation for tritium decay.
(b) How many disintegrations will be observed per minute in a 1.00-kg sample of water?