Isotopes of sodium

Sodium (Na) has several isotopes, but the most notable ones are: 1. **Sodium-23 (Na-23)**: This is the only stable isotope of sodium and accounts for almost all naturally occurring sodium. It has 11 protons and 12 neutrons. 2. **Sodium-22 (Na-22)**: This is a radioactive isotope of sodium with a half-life of about 2.6 years.