Mendelevium

fermium ← mendelevium → Nobelium Tm ↑ Md↓(Upu) 101 Md. The periodic table
General Information Elements
Name , symbol , atomic number	mendelevium, Md., 101
Chemical series	actinides
The Group , Period , Block	n / a , 7 , f
Appearance	unknown, probably Silvery white or metallic gray
Atomic mass	(258)  g / mol
Electron configuration	[ Rn ] 5f 13 7s 2
The number of electrons perskin	2, 8, 18, 32, 31, 8, 2
Physical characteristics
Phase	solid
Melting point	1100 K (827 ° C , 1521 ° F )
The characteristics of the atomic
Oxidation state	2, 3
Electronegativity	1.3 ( Pauling scale )
Ionization energy	The first: 635 kJ / mol
Other
Magnetic properties	no Data
CAS numbers	7440-11-1
Isotope
iso NA half-life DM DE ( MeV ) DP 257 Md. syn 5:52 h ε 0406 257 Fm α 7558 253 Ice SF - - 258 Md. syn 51.5 d ε 1230 258 Fm 260 Md. syn 31.8 d SF - - α 7000 256 Ice ε - 260 Fm β - 1000 260 No Mendelevium (pronounced / ˌ mɛndəlɛviəm / )) is a synthetic element with the symbolMd (formerly Mv ) and atomic number 101. This element is named after Dmitri Mendeleev .