Mendelevium

Mendelevium is a synthetic chemical element with the symbol Md and atomic number 101. It is a radioactive metal and part of the actinide series. Mendelevium was first synthesized in 1955 by bombarding einsteinium with alpha particles. Named after Dmitri Mendeleev, it has no significant commercial applications and is primarily used for research purposes.

Overview

English Name:

Mendelevium

Latin Name:

Mendelevium

Year Discovered:

1955

Discovered By:

Albert Ghiorso, et al.

Group:

Actinides

Period:

Electrons:

101

CAS Number:

7440-11-1

Cost Per 100 Grams:

Unknown

Atomic Properties

Electronic Configuration:

[Rn] 5f¹³ 7s²

Ion Charge:

Ionisation Energies:

6.58 eV

Atomic Radius (Empirical):

156 pm

Atomic Radius (Calculated):

Unknown

Covalent Radius:

169 pm

Van Der Waals Radius:

N/A

Ionisation Potential of An Atom:

~6.58 eV

Electrons Per Layer:

2, 8, 18, 32, 33, 8, 2

Atomic Multiplicities Of The Gas:

Atomic Weight:

258

Oxidation States

Reactivity

Electron Affinity:

Unknown

Valence:

Electronegativity:

Unknown

Thermal Properties

Melting Point:

827°C

Boiling Point:

Unknown

Critical Point:

Pressure: N/A

Temperature: N/A

Thermal Conductivity:

Unknown

Heat Capacity:

Specific: Unknown

Molar: Unknown

Thermal Coefficient:

Unknown

Enthalpy:

Fusion: Unknown

Vaporisation: Unknown

Atomization: Unknown

Curie Temperature:

N/A

Neel Temperature:

N/A

Superconductivity Point:

N/A

Physical and Chemical Properties

State of matter (25° C/ 77°F):

Solid

Density:

Solid: ~10.3 g/cm³

Molar Volume (Vmol):

~25.1 cm³/mol

Speed of Sound (Vs):

Unknown

Hardness:

N/A

Bulk Modulus (K):

Unknown

Shear Modulus (G):

N/A

Young's Modulus (E):

N/A

Color:

Silvery-white or grey

Brinell Hardness (MPa):

N/A

Liquid Density (Kg/m^3):

Unknown

Hardness of Mohs:

N/A

Refractive Index:

N/A

Vickers Hardness (MPa):

N/A

Crystal Structure:

N/A

Electromagnetic Properties

Electrical Type:

Conductor

Resistivity:

Unknown

Magnetic Type:

Paramagnetic

Superconductivity:

Not applicable

Volume Magnetic Susceptibility:

Unknown

Mass Magnetic Susceptibility:

Unknown

Molar Mass Susceptibility:

Unknown

Electrical Conductivity:

Unknown

Mass (γ_mass):

Unknown

Mass (γ_mol):

Unknown

Volume (γ_vol):

Unknown

Grid Parameters

Crystal Structure:

N/A

Grid Parameters:

N/A

Attitude:

N/A

Debye Temperature:

N/A

Safety and Precautions

Signal Word:

Danger

Hazard Statements:

H300, H340

Precautionary Statements:

P201, P202, P281, P308

RTECS Number:

Unknown

Risk:

Flammability: Not flammable
Health Risk: Radioactive
Reactivity: Stable
Specific Risk: Radiation hazard

Importance

Main sources:

Produced in nuclear reactors

Main Usage:

Research

Nuclear Properties

Radioactive:

Yes

Isotopes:

Md-256, Md-258, Md-260

Neutron Cross Sectional:

Unknown

Half Life (s):

~51 days

Lifetime:

Stable

Prevalence

Universe:

Trace

Sun:

Trace

Oceans:

Trace

Humans:

Trace

Earth's Crust:

Trace

Meteorites:

Trace