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Basic Information

Name: Oxygen
Symbol: O
Atomic Number: 8
Atomic Mass: 15.9994 amu
Melting Point: -218.4 °C (54.750008 K, -361.12 °F)
Boiling Point: -183.0 °C (90.15 K, -297.4 °F)
Number of Protons/Electrons: 8
Number of Neutrons: 8
Classification: Non-metal
Crystal Structure: Cubic
Density @ 293 K: 1.429 g/cm³
Color: colorless

Atomic Structure

Number of Energy Levels: 2

First Energy Level:

Second Energy Level:

Isotopes

Isotope	Half Life
O-15	122.2 seconds
O-16	Stable
O-17	Stable
O-18	Stable

Facts

Date of Discovery: 1774
Discoverer: Joseph Priestly
Name Origin: From the Greek words oxus (acid) and gennan (generate)
Uses: supports life
Obtained From: from liquid air

MLA Format for Citing This Page

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