The positions of three elements A, B and C in the Periodic Table are shown below:
Giving reasons, explain the following:
(i) Element A is a nonmetal.

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Solution

Reason why element A is a non-metal
Element A belongs to group 17, which means it has seven electrons in its outer shell.
A requires one more electron to achieve inert gas configuration, and obtaining one electron will result in the formation of a monovalent negative ion.
As a result, A is not a metal but is a non-metal.

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