15 P 30.974
Phosphorus
polyatomic nonmetal
Properties
- Atomic number
- 15
- Atomic mass
- 30.974 u
- Category
- polyatomic nonmetal
- Group
- 15
- Period
- 3
- Block
- p-block
- State (room temp)
- Solid
- Outer-shell electrons
- 5
- Electronegativity
- 2.19 (Pauling)
- Density
- 1.823 g/cm³
- Melting point
- -
- Boiling point
- -
Electron configuration
1s² 2s² 2p⁶ 3s² 3p³
Noble-gas shorthand: [Ne] 3s² 3p³
Electrons per shell: 2, 8, 5, which is 5 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Phosphorus
Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major forms (white phosphorus and red phosphorus), but due to its high reactivity, phosphorus is never found as a free element on Earth. Instead phosphorus-containing minerals are almost always present in their maximally oxidised state, as inorganic phosphate rocks.
- Discovered by Hennig Brand
- Appearance: colourless, waxy white, yellow, scarlet, red, violet, black
Phosphorus: frequently asked questions
- What is Phosphorus?
- Phosphorus (P) is the chemical element with atomic number 15. It is a nonmetal (polyatomic nonmetal).
- What is the atomic number of Phosphorus?
- Phosphorus's atomic number is 15, which means every Phosphorus atom has 15 protons in its nucleus.
- What is the electron configuration of Phosphorus?
- The electron configuration of Phosphorus is 1s2 2s2 2p6 3s2 3p3 (noble-gas shorthand: [Ne] 3s2 3p3). Its electrons are arranged in shells of 2, 8, 5, with 5 in the outermost shell.
- Is Phosphorus a metal or a nonmetal?
- Phosphorus is a nonmetal (polyatomic nonmetal).
- What group and period is Phosphorus in?
- Phosphorus is in group 15 and period 3 of the periodic table.
- Is Phosphorus a solid, liquid, or gas?
- At room temperature, Phosphorus is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.