102 No 259
Nobelium
actinide
Properties
- Atomic number
- 102
- Atomic mass
- 259 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 5f¹⁴
Noble-gas shorthand: [Rn] 5f¹⁴ 7s²
Electrons per shell: 2, 8, 18, 32, 32, 8, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Nobelium
Nobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science. A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series.
- Discovered by Joint Institute for Nuclear Research
Nobelium: frequently asked questions
- What is Nobelium?
- Nobelium (No) is the chemical element with atomic number 102. It is a metal: specifically an actinide.
- What is the atomic number of Nobelium?
- Nobelium's atomic number is 102, which means every Nobelium atom has 102 protons in its nucleus.
- What is the electron configuration of Nobelium?
- The electron configuration of Nobelium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 (noble-gas shorthand: [Rn] 5f14 7s2). Its electrons are arranged in shells of 2, 8, 18, 32, 32, 8, 2, with 2 in the outermost shell.
- Is Nobelium a metal or a nonmetal?
- Nobelium is a metal: specifically an actinide.
- What group and period is Nobelium in?
- Nobelium sits in the f-block (the actinide row) of period 7 on the periodic table.
- Is Nobelium a solid, liquid, or gas?
- At room temperature, Nobelium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.