A new isotope of a divalent metal is discovered. Some students are asked to predict its
properties.
Which student’s predictions are correct?
number of electrons - bonding in the oxide
in outer shell
A 2 covalent
B 2 ionic
C 6 covalent
D 6 ionic
Why is it B and not D?
Firstly because it is a METAL so its valency must be 2, and cannot be 6, because it would be a non-metal then.
Secondly because, it's a METAL OXIDE, which is ionic, i.e metal and non metal.