Atoms of eight elements A,B, C, D, E, F, G and H have the same number of electronic shells but are different 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 elements D is almost neutral.
Answer the following questions based on the information given here in :
(i) To which group or period of the periodic table do the listed elements belong ?
(ii) Which one of the eight elements is likely to be a noble gas ?
(iii) Which one of the eight elements would have the largest atomic radius ?
(iv) Which two elements amongst these are likely to be the non-metals ?
(v) Which one of these eight elements is likely to be a semi-metal or metalloid ?