15
P
30.974
Phosphorus
Element 15 · 30.974 u · p-block
nonmetal
Essential for life — found in DNA, RNA, and ATP. White phosphorus glows in the dark and is highly flammable.
Phase (STP)
Solid
Melting Point
44.15 °C
Boiling Point
280.5 °C
Density
1.82 g/cm³
Electronegativity
2.19
Atomic Radius
100 pm
Ionization Energy
1012 kJ/mol
Electron Affinity
72 kJ/mol
Discovered
1669 · Hennig Brand
Electron Configuration
[Ne] 3s2 3p3
Electron Orbitals
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