The correct order of energy of 2s orbitals in H, Li, Na and K, is (A)

1.	The correct order of energy of 2s orbitals in H, Li, Na and K, is (A) K < Na < Li < H (B) Na < Li < K < H (C) Na < K < H < Li (D) H < Na < Li < K
Answer» Correct option (A) K < Na < Li < H Explanation: As we go down the group IA, there is increase in shell so size of atom increases and energy of 2s orbital decreases.

The correct order of energy of 2s orbitals in H, Li, Na and K, is (A) K < Na < Li < H (B) Na < Li < K < H (C) Na < K < H < Li (D) H < Na < Li < K

Answer»

Correct option (A) K < Na < Li < H

Explanation:

As we go down the group IA, there is increase in shell so size of atom increases and energy of 2s orbital decreases.

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The correct order of energy of 2s orbitals in H, Li, Na and K, is (A) K &lt; Na &lt; Li &lt; H (B) Na &lt; Li &lt; K &lt; H (C) Na &lt; K &lt; H &lt; Li (D) H &lt; Na &lt; Li &lt; K

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The correct order of energy of 2s orbitals in H, Li, Na and K, is (A) K < Na < Li < H (B) Na < Li < K < H (C) Na < K < H < Li (D) H < Na < Li < K