Question

Arrange the following as per instructions given in the brackets:

(i) Cs, Na, Li, K, Rb (increasing order of metallic character) (4)

(ii) Mg, Cl, S, Na, Si (decreasing order of atomic size)

(iii) Na, K, Cl, S, Si (increasing order of ionisation energy)

(iv) Cl, F, Br, I (increasing order of electron affinity)

(v) He, Ar, Ne (increasing order of the number of electrons shells)

(vi) Na, Li, K (increasing ionisation energy)

(vii) F, Cl, Br (increasing electronegativity)

(viii) Na, K, Li (increasing atomic size)​

Answer 1

The following are arranged as per instructions given in the brackets:

(a) Mg, Cl. Na, S, Si (decreasing order of atomic)

Na>Mg>S>Si>Cl

(b) Cs, Na, Li, K, Rb (increasing metallic character)

Li<Na<K<Rb<Cs

(c) Na, K, CI, S. Si increasing ionisation potential)

K<Na<Si<S<CI

(d) CI, F. Br, I (increasing electron affinity)

I<Br<CI<F

(e) Cs. Na, Li, K, Rb (decreasing electronegativity)

Li>Na>K>Rb>Cs

(f) K, Pb, Ca, Zn (increasing reactivity)

Pb<Zn<Ca<K

(g) Li, K, Na, H (decreasing order of their potential ionisation)

Li<Na<K