Question

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Answer 1

• the atomic radius decreases as we move from left to right in a period with an increase in nuclear charge of the element.
• The atomic radius increases when we go down a group because of the addition of extra shell.

Answer 2

Answer:

1)The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase.

2) As you move across a period, atomic radius decreases