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Oxidation Numbers
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Total cards: 10•Content version: v3•Public deck•Updated: 8/1/2026
Card preview (10)
#1
Front (Question)
An atom in an element
Back (Answer)
0
#2
Front (Question)
Atoms in monoatomic ions / simple ions
Back (Answer)
The charge on the ion
#3
Front (Question)
The sum of oxidation numbers in a neutral compound equal to…
Back (Answer)
0
#4
Front (Question)
The sum of the oxidation numbers in a polyatomic atom equals to…
Back (Answer)
The charge on the ion
#5
Front (Question)
Group 1 atoms
Back (Answer)
Always +1 in compounds
#6
Front (Question)
Group 2 atoms
Back (Answer)
Always +2 in compounds
#7
Front (Question)
F
Back (Answer)
Always -1 in compounds
#8
Front (Question)
H
Back (Answer)
+1, except in metal hydrides where it is -1
#9
Front (Question)
O
Back (Answer)
-2, except in peroxides (o is -1) and OF (o is +2)
#10
Front (Question)
Cl
Back (Answer)
-1, except when combined with o or F