Question

Atoms of eight elements A, B.C, D, E, F, G and H have the same number of electronic =4 shells but different number of electrons in their outermost shells. It was found that element 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 Fare acidic. The oxide of element D is almost neutral

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() Which one of eight elements is likely to be a noble gas? (a) H (b) A (C) F (d) B

(ii) Which one of the eight elements would have the largest atomic radius? (a) C (b) D (C) A (d) F

(ii) Which two elements amongst these are likely to be non-metals? (a)A and C (b)E and F (c) A and E (d) G and H

(iv) Which one of these eight elements is likely to be a semi-metal or metalloid? (a)A (b)C (C)D (d)E​

Answer 1

Which one of eight elements is likely to be a noble gas? (a) H (b) A (C) F (d) B

(ii) Which one of the eight elements would have the largest atomic radius? (a) C (b) D (C) A (d) F

(ii) Which two elements amongst these are likely to be non-metals? (a)A and C (b)E and F (c) A and E (d) G and H

(iv) Which one of these eight elements is likely to be a semi-metal or metalloid? (a)A (b)C (C)D (d)E