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Phosphorus (P) – Element 15 of the periodic table

Phosphorus (symbol P) is element number 15 of the periodic table and belongs to the “Nonmetal” category. Its atomic mass is about 30.974, and its phase under standard conditions is Solid. This element sits in period 3 and group 15 of the periodic table, and its electrons are arranged in shells of 2, 8, 5. The short electron configuration of Phosphorus is [Ne] 3s² 3p³. Known uses of Phosphorus include Chemical fertilizers, Detergents and Matches.

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Properties of Phosphorus

Atomic number
15
Chemical symbol
P
Atomic mass
30.974
Category
Nonmetal
Period
3
Group
15
Phase
Solid
Protons
15
Electrons
15
Neutrons (approx.)
16
Electron shells
2, 8, 5
Outer-shell electrons
5
Discovered
Hennig Brand (1669)

Electron configuration of Phosphorus

The electron configuration of Phosphorus (P), with 15 electrons, is shown below. The last shell (shell 3) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p³
Short configuration
[Ne] 3s² 3p³
Last shell
3s² 3p³

What is electron configuration and how is it written?

Electron shells of Phosphorus

Distribution of 15 electrons of Phosphorus across shells K to M:

  1. K2
  2. L8
  3. M5

What is a nonmetal?

The nonmetals are usually poor conductors of heat and electricity and are brittle in solid form; they are the base elements of organic and biological chemistry.

Uses of Phosphorus

Frequently asked questions about Phosphorus

What is the atomic number of Phosphorus?

The atomic number of Phosphorus (P) is 15; that is, every atom of it has 15 protons.

What is the electron configuration of Phosphorus?

The electron configuration of Phosphorus (P) is 1s² 2s² 2p⁶ 3s² 3p³; in short form it is [Ne] 3s² 3p³, and its last shell is 3s² 3p³.

What is the chemical symbol of Phosphorus?

The chemical symbol of Phosphorus is P.

Where is Phosphorus located in the periodic table?

Phosphorus is located in period 3 and group 15 and belongs to the “Nonmetal” category.

What is the atomic mass of Phosphorus?

The atomic mass of Phosphorus is about 30.974 (atomic mass units).

What is the phase of Phosphorus under normal conditions?

The phase of Phosphorus under standard conditions is Solid.

What are the uses of Phosphorus?

Uses of Phosphorus include Chemical fertilizers, Detergents and Matches.

Who discovered Phosphorus?

Phosphorus was discovered by Hennig Brand in 1669.

Elements in the same category as Phosphorus (Nonmetal)

Hydrogen (H)Carbon (C)Nitrogen (N)Oxygen (O)Sulfur (S)Selenium (Se)

See all Nonmetals

Phosphorus’s group 15 neighbours

Nitrogen (N)Arsenic (As)Antimony (Sb)Bismuth (Bi)Moscovium (Mc)

Group 15 of the periodic table