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When an atom gains an electron what has taken place?
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
In the compound CaO if O has an oxidation number of -2 what is the oxidation number of Ca?
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
If an atom gives up two electrons it becomes an ion with a charge of
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
When hydrogen combines with a metal, the oxidation number of hydrogen is
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
A pure element (not in combination) will have an oxidation number of
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
In all compound except when combined with F or in a peroxide O has an oxidation number of
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
The sum of the oxidation numbers of all atoms in a netrual compound is
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
If H has an oxidation number of +1 and S has an oxidation number of-2 what will be the correct chemical formula for a compound containing only those two elements?
0
-2
reduction
+2
-1
+2
0
H2S (note the numbers should be subscripts)
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