A chemical compound has the following Lewis notation :
a) How many valence electrons does element Y have ?
Ans. Element Y has 6 valence electrons.
b) What is the valency of element Y ?
Ans. The valency of element Y is 2.
c) What is the valency of element X ?
Ans. The valency of element X is one.
d) How many covalent bonds are there in the molecule ?
Ans. Two covalent bonds are in the molecule.
e) To which groups the elements X and Y belong ?
Ans. The name for element X is Hydrogen.
The name for element Y is Oxygen.