Md

Mendelevium-249

Protons (Z)

101

Neutrons (N)

148

Mass number

249

Half-Life

25.6 s

Abundance

---

Mass

249.083 u

Mass Excess

77,180.0 keV

Spin

(7/2-)

Discovered

1973

Binding energy per nucleon

7,444 keV

Neutron separation energy

7,841 keV

Proton separation energy

2,007 keV

Decay Mode

Decay chain

Mendelevium-249Z 101 · N 14825.6 s
α75%
β⁺51%
β⁺64.7%
EC99.88%
α~100%
β⁻~100%
α~100%
α~100%
β⁻100%
α~100%
α100%
β⁻100%
α~100%
α~100%
α99.992%
β⁻97.91%
α100%
β⁻100%
α100%