Master Chemistry Formulas with Particle Models!

H
H
H
H
H
C
C
C
C
C
O
O
O
O
O
N
N
N
N
N
S
S
S
S
S
Cl
Cl
Cl
Cl
Cl
K
K
K
K
K
Na
Na
Na
Na
Na
Mg
Mg
Mg
Mg
Mg
Fe
Fe
Fe
Fe
Fe
Cu
Cu
Cu
Cu
Cu
Ag
Ag
Ag
Ag
Ag
Zn
Zn
Zn
Zn
Zn
Ba
Ba
Ba
Ba
Ba
Hint!
二酸化炭素
CO2
Answer
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