Atoms and Electrons » Exercise - 19. The nucleus of atom is made of : (a) protons & electrons (b) protons & neutrons (c) protons & krypton (d) neutron & electrons
Atoms and Electrons » Exercise - 12. Emission of a beta particle from an atom : (a) increases the number of protons in an atom (b) increases the number of neutrons in an atom (c) decreases the number of protons in an atom (d) decreases the number of neutrons in an atom