Template:Infobox mendelevium

Mendelevium, ₁₀₁Md

Mendelevium
Pronunciation	/ˌmɛndəˈliːviəm/ (MEN-də-LEE-vee-əm) /ˌmɛndəˈleɪviəm/ (MEN-də-LAY-vee-əm)
Mass number	[258]
Mendelevium in the periodic table
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 Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver 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 Mercury (element) Thallium Lead 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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Tm ↑ Md ↓ — fermium ← mendelevium → nobelium
Atomic number (Z)	101
Group	f-block groups (no number)
Period	period 7
Block	f-block
Electron configuration	[Rn] 5f13 7s2
Electrons per shell	2, 8, 18, 32, 31, 8, 2
Physical properties
Phase at STP	solid (predicted)
Melting point	1100 K ​(800 °C, ​1500 °F) (predicted)
Density (near r.t.)	10.3(7) g/cm3 (predicted)
Atomic properties
Oxidation states	+2, +3
Electronegativity	Pauling scale: 1.3
Ionization energies	1st: 636 kJ/mol
Other properties
Natural occurrence	synthetic
Crystal structure	​face-centered cubic (fcc) (predicted)
CAS Number	7440-11-1
History
Naming	after Dmitri Mendeleev
Discovery	Lawrence Berkeley National Laboratory (1955)
Isotopes of mendelevium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 256Md synth 77.7 min ε 256Fm α 252Es 257Md synth 5.52 h ε 257Fm α 253Es SF – 258Md synth 51.5 d α 254Es ε 258Fm β− 258No 259Md synth 1.60 h SF – α 255Es 260Md synth 31.8 d SF – α 256Es ε 260Fm β− 260No

Md · Mendelevium
Fm ← ibox Fm	iso 101 Md  [] IB-Md [] IBisos []	→ No ibox No
cat:Md (3) cat:Md-isotopes (19)  Commons  Wikidata:Q1898  Wiktionary
indexes by PT (page)

child table, as reused in {IB-Md}
Main isotopes of mendelevium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 256Md synth 77.7 min ε 256Fm α 252Es 257Md synth 5.52 h ε 257Fm α 253Es SF – 258Md synth 51.5 d α 254Es ε 258Fm β− 258No 259Md synth 1.60 h SF – α 255Es 260Md synth 31.8 d SF – α 256Es ε 260Fm β− 260No

Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt)
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
most stable isotope
Wikidata
Wikidata *
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (12) · (this table: )

References

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