Molecular Models of Different Substances
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Atom Symbol
Atom Name
Atom Symbol
Hydrogen
Sodium
Carbon
Magnesium
Sulfur
Nitrogen
Chlorine
Oxygen
Substance
Molecular formula
Water
H2O
Hydrogen gas
H2
Nitrogen gas
N2
Argon gas
Ar
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Atom Name
Argon
2D model
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Oxygen gas
O2
Carbon dioxide
CO2
Carbon monoxide
CO
Methane gas
CH4
Propane gas
C3H8
Epsom salt
magnesium sulfate
MgSO4
(non-hydrous)
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Citric acid
C6H8O7
Sucrose
C12H22O11
Sodium citrate
Na3C6H5O7
Baking soda
NaHCO3
Table salt
NaCl
(one kind of sugar)
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A single molecule of
this substance is not
well-defined. A salt
crystal has a repeating
structure similar to that
shown to the right.
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