Kr
Krypton-99
Protons (Z)
36
Neutrons (N)
63
Mass number
99
Half-Life
40.0 ms
Abundance
---
Mass
98.959 u
Mass Excess
-38,400.0 keV
Spin
(5/2-)
Discovered
1997
Binding energy per nucleon
8,175 keV
Neutron separation energy
2,351 keV
Proton separation energy
17,639 keV
Decay Mode
Decay chain
- KrKrypton-99Z 36 · N 6340.0 ms
- β⁻89%
- β⁻82.7%
- β⁻99.9%
- β⁻98.23%
- β⁻100%
- β⁻100%
- β⁻100%
- β⁻100%