1) Calcium belong to group? a) group 1 b) group 2 c) group 3 d) group 17 2) Which factors effect the increasing of the atomic radius? a) Effective nuclear charge, Zeff b) Screening effect 3) Which of the following is the electronic configuration for first ionisation energy of Magnesium? a) 1s² 2s² 2p⁶ b) 1s² 2s² 2p⁶ 3s¹ c) 1s² 2s² 2p⁶ 3s² 4) Choose the correct statement a) Ionic radius of cation is smaller than their respective atom b) Ionic radius of anion is smaller than their respective atom c) Ionic radius of cation is bigger than their respective atom

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