Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Element X ( IE ₁ = 495 kJ mol ⁻¹ , IE ₂ = 4562 kJ mol ⁻¹ ) is more metallic and forms a more basic oxide than Element Y ( IE ₁ = 737 kJ mol ⁻¹ , IE ₂ = 1450 kJ mol ⁻¹ , IE ₃ = 7732 kJ mol ⁻¹ ) which belongs to the same period. Reason (R): The large jump between the first and second ionization entha

Step-by-step solution

Assertion (A) is correct: For element X, the massive jump between IE ₁ and IE ₂ ( 495 to 4562 kJ mol ⁻¹ ) indicates it has 1 valence electron, so it belongs to Group 1 (alkali metals). For element Y, the massive jump is between IE ₂ and IE ₃ ( 1450 to 7732 kJ mol ⁻¹ ), indicating it has 2 valence electrons, so it belongs to Group 2 (alkaline earth metals). In a given period, Group 1 elements have larger atomic radii and lower effective nuclear charge than Group 2 elements, making them more metallic and their oxides