The most non-metallic element in group 17 is:
F
Cl
Br
I
Down the group metallic nature increases as atomic size increases. Thus, fluorine is the most nonmetallic among the given options.
The position of elements A,B,C,D and E in the periodic table are shown below:
Group 1Group 2Group 17Group 18−−−D−BC−A−−E
(a) State which are metals, non-metals and noble gas in this table.
(b) State which is the most reactive (i) metal (ii) non-metal
(c) Which type of ion will be formed by element A,B,and C.
(d) Which is larger in size (i) D or E (ii) B or C.