Oxygen

Statistics:

• Name: Oxygen
• Symbol: O
• Classification: Non-Metal
• Atomic Number: 8
• Atomic Mass: 15.9994 g/mol
• Density: 1.33 g/cm³
• Melting: -218.4°C
• Boiling: -182.9°C
• Protons & Electrons:8
• Neutrons:8
• Discovered: 1774
• Discovered By: Priestly and Scheele
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 6

Isotopes:

Isotope: Half-life

• ¹⁵O: 122.24 seconds
• ¹⁶O: stable
• ¹⁷O: stable
• ¹⁸O: stable

Brief Summary

Oxygen is a Non-Metal with the symbol 'O' and contains 8 Protons & Electrons with 8 neutrons in the nucleus of the atom. Oxygen has an atomic mass of 15.9994 g/mol and, at a temperature of 20°C, has a density of 1.33 g/cm³. It will melt at a temperature of -218.4°C and boil at -182.9°C.

Oxygen was discovered by Priestly and Scheele in 1774 and is named 'Oxygen' Greek words oxus (acid) and gennan (generate).

Some common usages for Oxygen: It is breathed to support life.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Oxygen :: O :: 8 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/oxygen.html>.