Mendelevium

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Mendelevium,  101Md
General properties
Mass nummer 258 (most stable isotope)
Mendelevium in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Tm

Md

(Upt)
fermiummendeleviumnobelium
Atomic nummer (Z) 101
Group group n/a
Period period 7
Element category   actinide
Block f-block
Electron confeeguration [Rn] 5f13 7s2
Electrons per shell
2, 8, 18, 32, 31, 8, 2
Pheesical properties
Phase (at STP) solit (predictit)
Meltin pynt 1100 K ​(827 °C, ​1521 °F) (predictit)
Atomic properties
Oxidation states 2, 3
Electronegativity Pauling scale: 1.3
Ionisation energies
  • 1st: 635 kJ/mol
  • (estimate)
Miscellanea
CAS Nummer 7440-11-1
History
Namin efter Dmitri Mendeleev
Diskivery Lawrence Berkeley Naitional Laboratory (1955)
Main isotopes o mendelevium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 257Md syn 5.52 h ε 257Fm
α 253Es
SF
258Md syn 51.5 d ε 258Fm
260Md syn 31.8 d SF
α 256Es
ε 260Fm
β 260No
| references | in Wikidata

Mendelevium is a synthetic element wi chemical seembol Md (umwhile Mv) an atomic nummer 101.