Return to the Main CHEMystery Page.
Return to the Periodic Table of the Elements

Element 101 - Mendelevium (Md)

After Dmitri Mendeleyev, who devised the periodic table; discovered in 1955. Bombarding the scantest unweighable quantities of einsteinium with helium nuclei, scientists identified mendelevium from the barest shred of evidence--one to three atoms per bombardment

Properties
Atomic Number:	101
Atomic Weight:	(258)
Electron Configuration (at ground state):	1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶4f¹⁴5d¹⁰5f¹³6s²6p⁶7s²
Oxidation States (Bold most stable):	+3
Melting Point (K):	1100
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type:	258 -- 55 days -- alpha particle emission
First Ionization Potential (V):	6.58
Electronegativity (Pauling's):	1.3
Thermal Conductivity (at 300K -- W m^-1 K^-1):	10

Element 101 - Mendelevium (Md)

Properties