Atomic NumberAtomic Number of Phosphorus
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 YearAbout 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 Symbol | P |
| Group | 15 |
| Period | 3 |
| Atomic Weight | 30.973762 u |
| Density | 1.82 g/cm3 |
| Melting Point (K) | 317.3 K |
| Melting Point (℃) | 44 (P4) °C |
| Boiling Point (K) | 550 K |
| Boiling Point (℃) | 280 (P4) °C |
| Heat Capacity | 0.769 J/g · K |
| Abundance | 1050 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Non-metal |
| Electronegativity (Pauling) χ | 2.19 |
| Ionization Energy (eV) | 10.48669 |
| Atomic Radius | 100pm |
| Covalent Radius | 106pm |
| Van der Waals Radius | 180 |
| Valence Electrons | 5 |
| Year of Discovery | 1669 |
| Discoverer | Brandt |