Naturally occurring isotopes
| Nominal mass | Accurate mass | % natural abundance | Nuclear spin | Nuclear magnetic moment | Enrichment available % |
|---|---|---|---|---|---|
| 23Na | 22.9897677 (10) | 100 | 3/2+ | 2.217520 | N/A |
Radioactive isotopes
| Nominal mass | Accurate mass | Half-life | Decay mode and energy | Nuclear spin | Nuclear magnetic moment |
|---|---|---|---|---|---|
| 22Na | 21.994434 | 2.605 y |  - (2.842); 90%; EC
10%;  |
3+ | +1.746 |
| 24Na | 23.990961 | 14.96 y | -
(5.514); |
4+ | +1.690 |