Atomic Number of Phosphorus

Phosphorus Atomic Number

Atomic Number of Phosphorus is 15.

Chemical symbol for Phosphorus is P. Number of protons in Phosphorus is 15. Atomic weight of Phosphorus is 30.973762 u or g/mol. Melting point of Phosphorus is 44 (P4) °C and its the boiling point is 280 (P4) °C.

» Boiling Point » Melting Point » Abundant » State at STP » Discovery Year

About Phosphorus

Phosphorus is a chemical element which comes in two forms, red and white one. Red phosphorus is a non-toxic solid which we all have in our kitchens, on the edges of our matchsticks. White phosphorus is highly toxic, and it can cause burns when contacting human skin. This chemical element has got its name after the Greek expression meaning brighter than light since this element glows in the dark by slow ‘burning’ light. This element is crucial for all living things on our planet since it supports energy generating processes. In nature, phosphorus can be found as an element of various compounds like phosphate rocks and other minerals. Industrially, phosphorus and its compounds can be used as fertilizers, steel production, producing detergents, household goods, soft drinks, poison for rodents, and so on.

Properties of Phosphorus Element

Atomic Number (Z)15
Atomic SymbolP
Atomic Weight30.973762 u
Density1.82 g/cm3
Melting Point (K)317.3 K
Melting Point (℃)44 (P4) °C
Boiling Point (K)550 K
Boiling Point (℃)280 (P4) °C
Heat Capacity0.769 J/g · K
Abundance1050 mg/kg
State at STPSolid
Electronegativity (Pauling) χ2.19
Ionization Energy (eV)10.48669
Atomic Radius100pm
Covalent Radius106pm
Van der Waals Radius180
Valence Electrons5
Year of Discovery1669

What is the Boiling Point of Phosphorus?

Phosphorus boiling point is 280 (P4) °C. Boiling point of Phosphorus in Kelvin is 550 K.

What is the Melting Point of Phosphorus?

Phosphorus melting point is 44 (P4) °C. Melting point of Phosphorus in Kelvin is 317.3 K.

How Abundant is Phosphorus?

Abundant value of Phosphorus is 1050 mg/kg.

What is the State of Phosphorus at Standard Temperature and Pressure (STP)?

State of Phosphorus is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Phosphorus Discovered?

Phosphorus was discovered in 1669.