Emert+II,+William

Argon "Ar"



 * Atomic number: 18
 * Atomic mass: 39.948g
 * Boiling Point: -302.4F
 * Melting point: -308.7 °F
 * Specific density: 1616 kg m-3
 * Protons 18
 * Neutrons 22
 * Electrons 18
 * Electron configuration: 2 in the first, 8 in the second, and 8 in the third.
 * Orbital Notation:1s2, 2s2, 2p6, 3s2, 3p6
 * 8 valence electrons
 * Compound in which found: Gas
 * Located in the atmosphere

Uses
Argon is used in many things like lightbulbs and medical lasers. In lightbulbs the argon is used to keep oxygen from eroding the hot filiment.

Chemical Properties
Forms 2 known compounds, and Argons emission spectrum includes red lines.

Physical Properties
odorless, colorless, and non toxic gas

Unusual facts

 * Discovered by Sir William Ramsay in 1894.
 * Argon is a byproduct of oxygen and nitrogen.
 * The symbol was A, until 1957.
 * Lord Rayleigh says that “Argon must not be deemed rare.” Because there is 65 trillion metric tons of argon in the atmosphere.
 * It is non toxic.

Bohr Model

Sources

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MLA Works cited

Jefferson Lab, [], Steve Gagnon, 12/10/2012

Webelements,[], Mark winter, 12/10/2012

Chemicool, [], David D, 2012