name of mendelevium

mendelevium (chemical element)

Periodic table location

atomic symbol | Md atomic number | 101 short electronic configuration | [Rn]7s^25f^13 Aufbau diagram | 5f 7s block | f period | 7 atomic mass | 258 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope) half-life | 51.5 days

melting point | 827 °C (rank: 56th) (properties at standard conditions)

valence | 3 electronegativity | 1.3 first ionization energy | 635 kJ/mol (kilojoules per mole) ionization energies | 635 kJ/mol

term symbol | ^2F_(7/2) (electronic ground state properties)

solar abundance | 0 mass% meteorite abundance | 0 mass% crust abundance | 0 mass% ocean abundance | 0 mass% human abundance | 0 mass% solar molar abundance | 0 mol% meteorite molar abundance | 0 mol% ocean molar abundance | 0 mol% crust molar abundance | 0 mol% human molar abundance | 0 mol%

half-life | 51.5 days lifetime | 74.3 days (rank: 1st) specific radioactivity | 363.6 TBq/g decay mode | alpha emission nuclear spin | Md-245: 1/2^- | Md-247: 1/2^- | Md-249: 7/2^- | Md-251: 7/2^- | Md-253: 1/2^- | Md-254: 0^- | Md-255: 7/2^- | Md-256: 1^- | Md-257: 7/2^- | Md-258: 8^- | Md-259: 7/2^- | Md-261: 7/2^- unstable isotopes | Md-258 (51.5 days) | Md-260 (31.8 days) | Md-257 (5.53 h) | Md-259 (97 min) | Md-256 (77 min) | Md-261 (40 min) | Md-255 (27 min) | Md-254 (10 min) | Md-253 (6 min) | Md-251 (4 min) | Md-262 (200 s) | Md-252 (140 s) | Md-250 (52 s) | Md-249 (24 s) | Md-248 (7 s) | Md-247 (1.12 s) | Md-246 (1 s) | Md-245 (900 µs)

CAS number | 7440-11-1