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22/11/2020 10:51 am
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The position of three elements A, B and C in the Periodic Table is shown below:
Group Period 1 2 13 14 15 16 17
1 B
2 A
3 C
Giving reasons, explain the following:
(a) Element A is non-metal.
(b) Atom of element C has a larger size than atom of element A.
(c) Element B has a valency of 1.
1 Answer
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22/11/2020 10:52 am
(a) It is because it has 7 valence electrons. It can gain one electron to form negative ion. So, it is a non-metal.
(b) ’C’ has more number of shells than A. So, it is larger in size.
(c) ’B’ has one valence electron. It can lose one electron to become stable. So, its valency is equal to 1.