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Diatomic Molecules

These molecules are composed of two atoms of the same element.

Tools

A	B
hydrogen	lightest gas
nitrogen	about 80% of the air we breathe
oxygen	about 20% of the air we breathe
fluorine	pale yellow gas
chlorine	yellow-green gas
bromine	reddish-brown liquid
iodine	bluish-black solid
helium	Oops -- a noble gas, NOT a diatomic molecule!