Question

25. a) The following table shows the position of five elemente
periodic table.
droup
Period
1
2
13
14
15
3
to 12
2
A
3
D
4
Answer the following giving reasons
(1) Name which element is a non-metal with valency one?
(ii) Which element is least reactive?
(iii) Out of D 8 E which element has a smaller atomic radius?
(iv) Out of B & C which element has a larger atomic radius?
(v) Name the special name given to group 16​

Answer 1

Explanation:

1) chlorine

2) noble glasses

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