Answer to Question #155797 in Chemistry for akinlabi

Question

a radioactive substance with initial atom after 3 alpha particles.find the atom that has disintegrated

Answer 1

Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two.

3 alpha decays result in mass number being reduced by 12 and an atomic number being reduced by 6.