XY
XY2
X2Y
X4Y6
Correct answer is B
No explanation has been provided for this answer.
Which of the following species does not contain a co-ordinate bond? ...
Air boiled out of water as steam is richer in ...
1s2, 2s2, 2p6, 3s2, 3p6, 3d7, 4s2 An element with the electronic configuration above is a...
An element wil readily form an electrovalent compound if it electron configuration is ...
The tincture of iodine means iodine dissolved in ...
Which of the following salt solutions will have a pH greater than 7? ...