Free elements such as Al and O2 have an oxidation number of 1.
2.
In most compounds, Hydrogen has an oxidation number of +1.
:
In most compounds, Hydrogen has an oxidation number of +1.
3.
Group 1A metals have an oxidation number of -1 in compounds.
:
Group 1A metals have an oxidation number of -1 in compounds.
4.
In compounds, Oxygen has an oxidation number of +2.
:
In compounds, Oxygen has an oxidation number of +2.
5.
Group 2A metals have an oxidation number of +2 in compounds.
:
Group 2A metals have an oxidation number of +2 in compounds.
6.
Group 7A nonmetals have an oxidation number of -1 in compounds.
:
Group 7A nonmetals have an oxidation number of -1 in compounds.
Column B
a.True
b.False
a.True
b.False
c.True
d.True
e.True
f.True