Answers

2015-06-01T07:46:20+05:30

The valency of Cu in CuO is 2
1 5 1
2015-06-01T08:10:22+05:30
The valency of Cu in CuO is 2 and Cu2O is 1.
1 5 1
The Its Valency is 2 in CuO
the formula being CuO

The copper donates two electrons to the oxygen and forms one ionic bond.
whereas in Cu2O the valency is 1.