Chemical Elements.com - Phosphorus (P)

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Basic Information

Name: Phosphorus
Symbol: P
Atomic Number: 15
Atomic Mass: 30.97376 amu
Melting Point: 44.1 °C (317.25 K, 111.38 °F)
Boiling Point: 280.0 °C (553.15 K, 536.0 °F)
Number of Protons/Electrons: 15
Number of Neutrons: 16
Classification: Non-metal
Crystal Structure: Monoclinic
Density @ 293 K: 1.82 g/cm³
Color: white

Atomic Structure

Number of Energy Levels: 3

First Energy Level:

Second Energy Level:

Third Energy Level:

Isotopes

Isotope	Half Life
P-31	Stable
P-32	14.28 days
P-33	24.3 days

Facts

Date of Discovery: 1669
Discoverer: Hennig Brand
Name Origin: From the Greek words phôs (light) and phoros (bearer)
Uses: fertilizers, detergents
Obtained From: phosphate rock

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