1.

Atomic radius goes on decreasing while going from left to right in a period.

Answer»

Solution :(i) Atomic radius is the distance between the centre of the ATOM and its OUTMOST shell.
(ii) Atomic radius decreases across a period.
(iii) This is because valence electrons are being added to the same outermost shell or to the same energy level because of which the electrons added EXPERIENCE GREATER pull from the nucleus.
(iv) This results in the electrons moving closer to the nucleus. Hence, the atomic radius goes on decreasing while going from left to RIGHT in a period.


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