← Back to periodic table
Mendelevium (Md)
Atomic number: 101 · Category: actinide · Group 3 · Period 7 · Phase: Solid
Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate actinide and the ninth transuranic element.
Block: f
CPK color:#b30da6
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f13
Configuration (semantic): [Rn] 5f13 7s2
Shells: 2, 8, 18, 32, 31, 8, 2
Electronegativity (Pauling): 1.3
Electron affinity: 93.91
Ionization energies: 635
Periodic position
Group: 3
Period: 7
xpos: 15
ypos: 10
Spectral/Bohr images
Image
3D Model