Question

why are lighter isotopes radioactive ​

Answer 1

Explanation:

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon

number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom.

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Answer 2

Explanation:

Stable isotopes do not decay into other elements. In contrast, radioactive isotopes (e.g., 14C) are unstable and will decay into other elements. ... The chemical bonds and attractive forces of atoms with heavy stable isotopes are stronger than those in the more common, lighter isotopes of an element.

These have same protons but different number of nuetron in each atom

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