Mendelevium
101
Md
Group
n/a
Period
7
Block
f
Protons
Electrons
Neutrons
101
101
157
General Properties
Atomic Number
101
Atomic Weight
[258]
Mass Number
258
Category
Actinides
Color
n/a
Radioactive
Yes
Named after Dmitri Mendeleev, who created the Periodic Table
Crystal Structure
n/a
History
Mendelevium was discovered by Albert Ghiorso, Glenn T. Seaborg, Gregory R. Choppin, Bernard G. Harvey and Stanley G. Thompson in 1955 at the University of California, Berkeley.
It was produced by the bombardment of einsteinium with helium.
Mendelevium was identified by chemical analysis in an ion exchange experiment.
It was produced by the bombardment of einsteinium with helium.
Mendelevium was identified by chemical analysis in an ion exchange experiment.
Electrons per shell
2, 8, 18, 32, 31, 8, 2
Electron Configuration
[Rn] 5f13 7s2
Mendelevium was the first element to be produced one atom at a time
Physical Properties
Phase
Solid
Density
-
Melting Point
1100 K | 826.85 °C | 1520.33 °F
Boiling Point
-
Heat of Fusion
n/a
Heat of Vaporization
n/a
Specific Heat Capacity
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
Image Credits: Wikimedia Commons (Serge Lachinov)
The element is named to honor Dmitri Mendeleev, the developer of the periodic table of elements
CAS Number
7440-11-1
PubChem CID Number
n/a
Atomic Properties
Atomic Radius
-
Covalent Radius
-
Electronegativity
1.3 (Pauling scale)
Ionization Potential
6.58 eV
Atomic Volume
-
Thermal Conductivity
0.1 W/cm·K
Oxidation States
2, 3
Applications
Mendelevium is used for scientific research purposes only.
Mendelevium is harmful due to its radioactivity
Isotopes
Stable Isotopes
-Unstable Isotopes
245Md, 246Md, 247Md, 248Md, 249Md, 250Md, 251Md, 252Md, 253Md, 254Md, 255Md, 256Md, 257Md, 258Md, 259Md, 260Md, 261Md, 262Md