Oxygen+ Maisha


 * Element Name:** Oxygen


 * Element Symbol:** O


 * Atomic Mass**: 16[[image:OxygenMaisha.png width="216" height="288" align="right"]]


 * Atomic Number:** 8


 * Protons:** 8


 * Electrons:** 8


 * Discovery (Who & When):** Discovered by Joseph Priestly and Carl Wilhelm Scheele at 1774.


 * State of Matter:** Gas


 * Melting Point:** -218.79°C


 * Boiling Point:** -182.95°C


 * Characteristics :** Radioactive isotopes of oxygen are ordinarily in nature. Oxygen is colorless and odorless gas with molecular formula O2.


 * Use of Element:** Required by most living organisms.


 * Interesting Facts:** Oxygen is the third most abundant element in the universe and makes up nearly 21% of the earth's atmosphere. 0.9% of the suns mass are oxygen. Also, oxygen constitutes 49.2 of earth's crust my mass.

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