Md
Mendelevium
Atomic number: 101Mass: 258 uCategory: Actinide
About Mendelevium
Mendelevium is a synthetic element produced by bombarding einsteinium with helium ions. It was named after Dmitri Mendeleev, the creator of the periodic table. The first 17 atoms of mendelevium ever detected were produced one at a time.
Properties
Period
7
Group
N/A
Block
F
Category
Actinide
Electronegativity
1.30 (Pauling)
Ionization Energy
635 kJ/mol
Melting Point
1100 K (827°C)
Boiling Point
Unknown
Density
Unknown
Oxidation States
+2, +3
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶ 5f¹³ 7s²
[Rn] 5f¹³ 7s²
Shell 1:2e⁻
Shell 2:8e⁻
Shell 3:18e⁻
Shell 4:32e⁻
Shell 5:31e⁻
Shell 6:8e⁻
Shell 7:2e⁻
Real-World Uses
Research only
Scientific studies
Atomic structure research
No practical applications
Nuclear science
Fun Fact
Mendelevium was named after Mendeleev — the man who invented the periodic table itself! The first batch produced was just 17 atoms.