Question

how the atomic radius changes across the period and down the group​

Answer 1

Answer:

Atomic radius increases as we move down the group (size of atom increase) and decreases across the period

Answer 2

Answer:

Atomic radius decreases from left to right within a period. This is caused by the increase in the number of protons and electrons across a period. ... Atomic radius increases from top to bottom within a group. This is caused by electron shielding

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