Element
Each element is a unique
atom made of protons,
neutrons, and electrons.
Examples:
O, Fe, Na, Hg, Au, K
Molecule
Compound
Mixture
Any two or more atoms
Two or more different
combined chemically.
elements
Includes two or more of
combined chemically.
the same or two or more
different atoms.
Water
Water Molecule
H₂O
H₂O
Ozone
NaCl
Molecule
Table Salt
O₃
Two or more substances
combined physically.
There is no chemical bond.
Examples:
O₂, H₂, Cl₂, N₂
NH₃, CO₂, H₂O, NaCl,
CuSO₄
Examples:
Salad, Lemonade and
water, ice cream, trail mix,
humans
Examples:
NH₃, CO₂, H₂O, NaCl,
CuSO₄, NaHCO₃