Phosphorus was discovered in 1669 by German alchemist Hennig Brand.
Name: phosphorus
Symbol: P
Atomic number: 15
Atomic weight: 30.974
State: solid
Group, period, block: 15, 3, p
Color: colourless, waxy white, yellow, scarlet, red, violet, black
Classification: Non-metallic
Electron configuration: 3s2 3p3
2,8,5
Physical properties
Density @293 K:: 1.823 g.m-3
Melting point: 44.1 °C (317.25 K, 111.38 °F)
Boiling point: 280.0 °C (553.15 K, 536.0 °F)
Atomic properties
Oxidation states: 5, 4, 3, 2[2], 1[3], -1, -2, -3
Electronegativity: 2.19 (Pauling scale)
Ionization energies: 1st: 1011.8 kJ·mol-1
Covalent radius: 107±3 pm
Van der Waals radius: 180 pm
- P
Electron Configuration
Isotopes
There is one naturally occurring isotopes of magnesium exists, 31P.