Question

Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic
different in their outermost shells. It was found that elements A and G combine
round which can also be extracted from sea water Oxides of the elements and
mature while those of E and F are acidic The oxide of element D is almost neutral
ve the same number of electronic shells but are
nd that elements A and G combine to form an ionic
(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 the non-metals?
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Answer 1

Answer:

a) A-1st group

B-2nd group

C-13group

D - 14 group

E - 15 group

F - 16 group

G - 17 group

H - 18 group

All belongs to 3rd period

b) H

c) A

d) E and F