8. radioactive decay is accompanied by a change in the mass number, a change in the atomic number, a change in both, or a change in neither. for the following types of radioactive decay, which change(s) do you expect? a. alpha emission b. beta emission c. gamma emission

a. alpha emission : atomic number decreases by 2 units and mass number decreases by 4 units.

b. beta emission : atomic number increases by 1 unit and mass number remains same.

c. gamma emission : atomic number and mass number both remain same.

Explanation:

1. Alpha emmision: In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units, thus atomic number decreases by 2 units and mass number decreases by 4 units.

2.)Beta-emmision: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units, thus atomic number increases by 1 unit and mass number remains same.

3.) Gamma ray emission: in this process, an unstable nuclei gives off excess energy by a spontaneous electromagnetic process and releases . These radiations does not carry any charge and are electrically neutral, thus atomic number and mass number both remain same.

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