Question

following are elements of third period of modern periodic table - Na(11),Mg(12),Al(13),Si(14),P(15),S(16),Cl(17).
1. Which of these element has
a) largest atomic size
b) most metallic
c) most electronegative
d) most non-metallic
2. Mention three pairs of elements from given element which have similar valency.
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Answer 1

Answer:

A) Cl(17)

B) Al(13)

C)

D) Mg(12)

2) Sl,Cl,Na

Explanation:

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