Q3 of 18 Page 226

A chemical compound has the following Lewis notation:

a) How many valence electrons does element Y have?


b) What is the valency of element Y ?


c) What is the valency of element X ?


d) How many covalent bonds are there in the molecule?


e) Suggest a name for elements X and Y.


(a) Six ( all the crosses represent the valence electrons)


(b) Two (two more electrons are required to obtain octet )


(c) One (one more electron needed to obtain stable duplet structure)


(d) Two bonds


(e) Element X can be Hydrogen and Y can be oxygen


More from this chapter

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1

List the factors that determine the type of bond that will be formed between two atoms?

 2

Explain the difference between the valence electrons and the covalence of an element.

 4

Why do only valence electrons involve in bond formation? Why not electron of inner shells? Explain.

 5

Explain the formation of sodium chloride and calcium oxide on the basis of the concept of electron transfer from one atom to another atom.