
Mendelevium (Md) is a chemical element of the periodic table, located in the period 7, and has the atomic number 101. It is the thirteenth element in the actinide series. It is a silvery-white metal which is named after the Russian chemist Dmitri Mendeleev. It is the ninth transuranium element and is counted as one of the radioactive elements.
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– f block |
FAQs on Mendelevium Element
Mendelevium |
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‣ Who discovered mendelevium and in what year? Discovery: Lawrence Berkeley National Laboratory (1955) |
‣ Where is mendelevium found on the periodic table?![]() Location: Mendelevium is found in the seventh row of the periodic table, next to the fermium element. |
‣ What is mendelevium atomic mass number? Atomic number (Z): 101 |
‣ Mendelevium symbol: Md |
‣ Mendelevium atomic weight: [258] |
‣ What block is mendelevium in the periodic table? Block: f-block |
‣ What period is mendelevium on the periodic table? Period: 7 |
‣ What’s the melting point of mendelevium? Melting point: 1100 K (827 °C, 1521 °F) (predicted) |
‣ How many electron shells does mendelevium have? Electrons per shell: 2, 8, 18, 32, 31, 8, 2 |
‣ Mendelevium electron configuration: [Rn] 5f13 7s2 |
‣ Mendelevium ionization energies:1st: 636 kJ/mol |
‣ What is the phase of mendelevium? Phase (at r.t): solid (predicted) |
‣ Mendelevium density (near r.t): 10.3 g/cm3 (predicted) |
‣ Mendelevium natural occurrence: synthetic |
‣ Mendelevium oxidation state: +2, +3 |
‣ Mendelevium electronegativity: Pauling scale: 1.3 |
‣ Mendelevium crystal structure: face-centered cubic (fcc) (predicted) |
‣ Mendelevium CAS number: 7440-11-1 |
‣ How many isotopes does mendelevium have?
Main isotopes of mendelevium | ||||
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Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
256Md | syn | 1.17 h | ε | 256Fm |
257Md | syn | 5.52 h | ε α SF | 257Fm 253Es – |
258Md | syn | 51.5 d | α ε β– | 254Es 258Fm 258No |
259Md | syn | 1.60 h | SF α | – 255Es |
260Md | syn | 31.8 d | SF α ε β– | – 256Es 260Fm 260No |
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