Question

Pls give the answer of Q.5

Answer 1

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Δ.Smallest element of the third period⇒ $\huge{\bold{\yellow{\boxed{Cl(17)}}}}$

Δ.A noble gas⇒$\huge{\bold{\yellow{\boxed{He(2)}}}}$

Δ.A metal of the 3rd period having valency 1⇒$\huge{\bold{\yellow{\boxed{Na(11)}}}}$

Δ.Most non-metallic element of 2nd period⇒ $\huge{\bold{\yellow{\boxed{F(9)}}}}$

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