65 Tb 158.925
Terbium
lanthanide
Properties
- Atomic number
- 65
- Atomic mass
- 158.925 u
- Category
- lanthanide
- Group
- f-block
- Period
- 6
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.1 (Pauling)
- Density
- 8.23 g/cm³
- Melting point
- 1355.85 °C
- Boiling point
- 3122.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁹
Noble-gas shorthand: [Xe] 4f⁹ 6s²
Electrons per shell: 2, 8, 18, 27, 8, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Terbium
Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite.
- Discovered by Carl Gustaf Mosander
- Appearance: silvery white
Terbium: frequently asked questions
- What is Terbium?
- Terbium (Tb) is the chemical element with atomic number 65. It is a metal: specifically a lanthanide.
- What is the atomic number of Terbium?
- Terbium's atomic number is 65, which means every Terbium atom has 65 protons in its nucleus.
- What is the electron configuration of Terbium?
- The electron configuration of Terbium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f9 (noble-gas shorthand: [Xe] 4f9 6s2). Its electrons are arranged in shells of 2, 8, 18, 27, 8, 2, with 2 in the outermost shell.
- Is Terbium a metal or a nonmetal?
- Terbium is a metal: specifically a lanthanide.
- What group and period is Terbium in?
- Terbium sits in the f-block (the lanthanide row) of period 6 on the periodic table.
- Is Terbium a solid, liquid, or gas?
- At room temperature, Terbium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.