Na has physical and chemical properties similar to which element(s) and why?

Question

Study the Periodic Table and answer the following questions:

(i) Na has physical and chemical properties similar to which element(s) and why?

(ii) Write the electronic configuration of N and P. Which one of these will be more electronegative and why?

PERIOD	GROUP
	I	II	III	IV	V	VI	VII	Zero
1.	H							He
2.	Li	Be	B	C	N	O	F	Ne
3.	Na	Mg	Al	Si	P	S	Cl	Ar
4.	K	Ca

Answer 1

(i) Na has similar properties as of the same group members as K, Rb, Cs. They contain 1 valence in the outermost shell so all of them are reactive.

(ii) Nitrogen:- 2,5

Phosphorus:- 2,8,5

Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

Nitrogen is more electronegative because in nitrogen outermost shell is nearer to nucleus and nucleus will attract electrons easily.