oxididation numbers Flashcards
1
Q
uncombined element
A
0
2
Q
combined oxygen (with different element)
A
-2
3
Q
combined hydrogen
A
+1
4
Q
simple ion
A
charge on ion
5
Q
combined fluorine
A
-1
6
Q
H in metal hydrides
A
- 1
e. g. NaH, CaH2
7
Q
O in peroxides
A
- 1
e. g. H2O2
8
Q
O bonded to F
A
+2
F2O
9
Q
what does loss of electrons mean
A
oxidation
10
Q
what does gain of electrons mean
A
reduction
11
Q
ON of H2
A
0 (any diatomic molecule is 0)
12
Q
ON of H in 3H2O
A
+1 (just look at individual element, not number before or after it)
