Question

Arrange as per the instruction :
(i) He, Ar, Ne (Increasing order of the number of electron shells)
(ii) Na, Li, K (Increasing Ionization Energy)
(iii) F, Cl, Br (Increasing electronegativity)
(iv) Na, K, Li (Increasing atomic size).

  • Periodic Table
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Answer

(i) He < Ne < Ar

Reason — Number of electron shells increases as we move down the group.

(ii) K < Na < Li

Reason — Ionization Potential decreases as we move down the group.

(iii) Br < Cl < F

Reason — Electronegativity decreases as we move down the group.

(iv) Li < Na < K

Reason — Atomic Size increases as we move down the group.

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