11th Class Chemistry Classification of Elements and Periodicity in Properties

  • question_answer 20) How do atomic radius vary in a period and in a group? How do you explain the variation?


    Within a group, the atomic radius increases down the group. This is because a new energy shell is added in each succeeding element which decreases force of attraction towards nucleus. In a period, the atomic radius decreases from left to right as effective nuclear charge increases from member to member.

You need to login to perform this action.
You will be redirected in 3 sec spinner