P
Phosphorus (Atomic Number 15)
Category: reactive-nonmetal | Period 3, Group 15 | Block: p
Multiform nonmetal essential for cellular energy transfer (ATP).
Atomic & Physical Constants
- Standard Atomic Weight:
- 30.9737619985 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 5
- Electronegativity (Pauling):
- 2.19
- Melting Point:
- N/A
- Boiling Point:
- N/A
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Agricultural fertilizers, safety match heads, detergents
Discovery History
Discovered by Hennig Brand (1669).
Study Phosphorus with Socratic AI Tutor
Get step-by-step orbital hybridization, oxidation state derivations, and reaction practice questions.