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InterviewSolution
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There is a tendency for the elements of groups 13 to 15 of higher periods, particulary period 6, to form compounds with ions having a positive charge of ___________less than the group number.A. oneB. threeC. fourD. two |
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Answer» Correct Answer - D Ions with charge equal to the group number minus two are obtained when the np electrons of an atom are lost but the `ns^2` electrons are retained. This is referred to as inert pair effect. Tl of group 13 prefers to form compounds with `1+` charge. In group 14, a few compounds of `4+` ions are known because the energy required to form ions is so great. However, tin and lead commonly form compounds with `2+` ions (ionic charge is equal to the group number minus two). `SnCl_2` is an ionic compound but `SnCl_4` is a covalent compound. Bismuth, in group 15, a metallic, element forms compounds containing `Bi^(3+)` ions (ionic charges is equal to the group number minus two). |
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