Nobelium (No)
Nobelium
Nobelium (No) is an actinide in period 7. Its relative atomic mass is [259] and the molar mass of the atom is [259] g/mol.
Atomic number 102
Atomic mass [259] predicted
Molar mass [259] g/mol
Category Actinide Unknown
Properties of nobelium
| Atomic number | 102 |
|---|---|
| Symbol | No |
| Latin name | Nobelium |
| Relative atomic mass | [259] |
| Molar mass | [259] g/mol |
| Group, period, block | —, 7, f |
| Category | Actinide |
| State at 20 °C | Unknown |
| Electron configuration | [Rn] 5f¹⁴ 7s² |
| Electronegativity (Pauling) | 1.3 |
Electron configuration of nobelium
Electrons per shell
K2L8M18N32O32P8Q2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 7s²
Noble-gas notation
102 protons · 102 electrons[Rn] 5f¹⁴ 7s²
Formula and compounds of nobelium
Simple substanceNonobeliumMolar mass of No: [259] g/mol
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Frequently asked questions
The relative atomic mass of nobelium is [259], so the molar mass of the atom is [259] g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 7s². Noble-gas notation: [Rn] 5f¹⁴ 7s².