1) Which of this following have the largest size a) Mg2+ b) O2- c) F- d) K+ e) Ne 2) When down a group, atomic radius is a) increase b) constant c) decrease 3) Electronic configuration of Ca is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² . So, Ca is in period a) 3 b) 8 c) 2 d) 4 4) Proton number of aluminium is 13 . Aluminium is in group a) 13 b) 3 c) 2 d) 12 5) Anion always ________ than its atom a) smaller b) larger 6) When the size of the atom is decrease , the ionization energy is a) decrease b) constant c) increase 7) MgO is a a) acidic oxide b) amphoteric oxide c) basic oxide 8) When screening effect of an atom is increase, its atomic radius is a) decrease b) increase

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