71 Lu 174.967
Lutetium
lanthanide
Properties
- Atomic number
- 71
- Atomic mass
- 174.967 u
- Category
- lanthanide
- Group
- 3
- Period
- 6
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.27 (Pauling)
- Density
- 9.841 g/cm³
- Melting point
- 1651.85 °C
- Boiling point
- 3401.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹
Noble-gas shorthand: [Xe] 4f¹⁴ 5d¹ 6s²
Electrons per shell: 2, 8, 18, 32, 9, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Lutetium
Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths.
- Discovered by Georges Urbain
- Appearance: silvery white
Lutetium: frequently asked questions
- What is Lutetium?
- Lutetium (Lu) is the chemical element with atomic number 71. It is a metal: specifically a lanthanide.
- What is the atomic number of Lutetium?
- Lutetium's atomic number is 71, which means every Lutetium atom has 71 protons in its nucleus.
- What is the electron configuration of Lutetium?
- The electron configuration of Lutetium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d1 (noble-gas shorthand: [Xe] 4f14 5d1 6s2). Its electrons are arranged in shells of 2, 8, 18, 32, 9, 2, with 2 in the outermost shell.
- Is Lutetium a metal or a nonmetal?
- Lutetium is a metal: specifically a lanthanide.
- What group and period is Lutetium in?
- Lutetium is in group 3 and period 6 of the periodic table.
- Is Lutetium a solid, liquid, or gas?
- At room temperature, Lutetium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.