Phosphorus (P)
Phosphorus
Phosphorus (P) is a non-metal in period 3, group 15. Its relative atomic mass is 30.974 and the molar mass of the atom is 30.974 g/mol; the molar mass of P₄ is 123.896 g/mol.
Atomic number 15
Atomic mass 30.974
Molar mass 30.974 g/mol P₄: 123.896 g/mol
Category Non-metal Solid
Properties of phosphorus
| Atomic number | 15 |
|---|---|
| Symbol | P |
| Latin name | Phosphorus |
| Relative atomic mass | 30.974 |
| Molar mass | 30.974 g/mol · P₄: 123.896 g/mol |
| Group, period, block | 15, 3, p |
| Category | Non-metal |
| State at 20 °C | Solid |
| Electron configuration | [Ne] 3s² 3p³ |
| Electronegativity (Pauling) | 2.19 |
| Atomic radius | 100 pm |
Electron configuration of phosphorus
Electrons per shell
K2L8M5
Full notation
1s² 2s² 2p⁶ 3s² 3p³
Noble-gas notation
15 protons · 15 electrons[Ne] 3s² 3p³
Formula and compounds of phosphorus
Simple substanceP₄phosphorusMolar mass of P₄: 123.896 g/mol
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Frequently asked questions
The relative atomic mass of phosphorus is 30.974, so the molar mass of the atom is 30.974 g/mol; the molar mass of P₄ is 123.896 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p³. Noble-gas notation: [Ne] 3s² 3p³.