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Atoms & Molecules
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A
B
O
atom of oxygen
O2
molecule of oxygen
molecule
minimum of 2 atoms chemically bonded
chemical formula
Element Symbols and possibly numbers that represents a chemical
2 H2O
2 molecules of water
CO2
1 molecule of carbon dioxide
2 CO2
2 molecules of carbon dioxide
2 FeO3
8 total atoms
Model,
Water Molecule
Coefficient
Number in front of chemical formula that tells how many molecules there are
subscript
small number after element symbol tells the # of atoms in the element before it
sylvia marino
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