Question

why atomic size increases down the group​

Answer 1

Answer:

In general, atomic radius decreases across a period and increases down a group. ... Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.

Explanation:

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Answer 2

Explanation:

• In general, atomic radius decreases across a period and increases down a group. Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.

• As you move down a column or group, the ionic radius increases. This is because each row adds a new electron shell. More protons are added, but the outer valence shell remains the same, so the positively charged nucleus draws in the electrons more tightly