Isotopes of argon

Argon has several isotopes, but the most common ones are: 1. **Argon-36** (¹⁶Ar) - This is a stable isotope and constitutes about 0.34% of natural argon. 2. **Argon-38** (³⁸Ar) - Another stable isotope, making up about 0.06% of natural argon.