Stable isotopes are non-radioactive form of atoms.
properties of stable isotopes are :-
- They have a stable nucleus that does not decay, so they are stable.
- Most of the isotopes become stable by emitting alpha particles, beta particles, positrons, or gamma rays.
- A few of them become stabilize themselves by electron capture or by spontaneous fission.
- there are 256 known stable isotopes of the 80 elements which have one or more stable isotopes.
The element which has largest number of stable isotopes is tin (symbol Sn and atomic number 50) with 10 isotopes.
Atoms found in nature are either stable or unstable. An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy.
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