101 Md 258
Mendelevium
actinide
Properties
- Atomic number
- 101
- Atomic mass
- 258 u
- Category
- actinide
- Group
- f-block
- Period
- 7
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.3 (Pauling)
- Density
- -
- Melting point
- 826.85 °C
- Boiling point
- -
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹³
Noble-gas shorthand: [Rn] 5f¹³ 7s²
Electrons per shell: 2, 8, 18, 32, 31, 8, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Mendelevium
Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate actinide and the ninth transuranic element.
- Discovered by Lawrence Berkeley National Laboratory
Mendelevium: frequently asked questions
- What is Mendelevium?
- Mendelevium (Md) is the chemical element with atomic number 101. It is a metal: specifically an actinide.
- What is the atomic number of Mendelevium?
- Mendelevium's atomic number is 101, which means every Mendelevium atom has 101 protons in its nucleus.
- What is the electron configuration of Mendelevium?
- The electron configuration of Mendelevium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f13 (noble-gas shorthand: [Rn] 5f13 7s2). Its electrons are arranged in shells of 2, 8, 18, 32, 31, 8, 2, with 2 in the outermost shell.
- Is Mendelevium a metal or a nonmetal?
- Mendelevium is a metal: specifically an actinide.
- What group and period is Mendelevium in?
- Mendelevium sits in the f-block (the actinide row) of period 7 on the periodic table.
- Is Mendelevium a solid, liquid, or gas?
- At room temperature, Mendelevium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.