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Per NCERT §3.6.1, alkali metals (Group 1) and alkaline earth metals (Group 2) have outermost configurations of which form?
A(n−1)d¹ ns² and ns² np¹
Bns¹ (Group 1) and ns² (Group 2)
Cns² np⁶ and ns² np⁵
Dns² np¹ and ns² np²
Answer & Solution
Correct answer: B. ns¹ (Group 1) and ns² (Group 2)
Per NCERT §3.6.1, s-block: Group 1 = ns¹, Group 2 = ns². They form +1 and +2 ions easily.
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