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Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of element D is almost neutral. Answer the following questions based on the information given herein:(a) To which group or period of the periodic table do the listed elements belong?(b) Which one of the eight elements is likely to be a noble gas?(c) Which one of the eight elements would have the largest atomic radius?(d) Which two elements amongst these are likely to be non-metals?(e) Which one of the these eight elements is likely to be a semi-metal or metalloid? |
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Answer» Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of element D is almost neutral. Answer the following questions based on the information given herein: (a) To which group or period of the periodic table do the listed elements belong? (b) Which one of the eight elements is likely to be a noble gas? (c) Which one of the eight elements would have the largest atomic radius? (d) Which two elements amongst these are likely to be non-metals? (e) Which one of the these eight elements is likely to be a semi-metal or metalloid? |
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