What Is the Formula for Argon Gas?


Quick Answer

The molecular formula for argon gas is Ar. Argon exists as a gas at room temperature, so its chemical symbol is the molecular formula for argon gas.

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What Is the Formula for Argon Gas?
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Full Answer

Argon was discovered in 1894 by Lord Rayleigh and Sir William Ramsay. The two scientists isolated the gas from a sample of clean air. The gas is found naturally in the atmosphere and comprises approximately 1 percent of the Earth's atmosphere. On the periodic table, Argon is found in period 8 and is a part of the noble gas group. It also has an atomic number of 18 and is considered to be completely inert.

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