18-Ar-49

Atomic Mass: 48.9821800 ± 0.0005400 amu
Excess Mass: -16599.000 ± 503.000 keV
Binding Energy: 398012.000 ± 503.000 keV
Beta Decay Energy: B- 13721.000 ± 508.000 keV

Half life: 170 NS