How does shielding effect atomic radius?

Answer 1

Down a group, the atomic radius increases as the nuclear shielding increases. Across a periodic, the atomic radius decreases as the nuclear shielding stays the same.

Moving down a group increases the number of energy levels by 1, which makes the atom larger. (b) This increasing number of energy levels increases the nuclear shielding, which means that outer e- feel less pull towards the positive nucleus because they are protected by filled, inner e- shells. These are the reasons why the atomic radius increases.

Across a Period • There are a few reasons why the atomic radius decreases: (a) The number of energy levels does not change as one moves from L to R across the periodic table, meaning that the e- are not further away from the nucleus and experience its pull; (b) As a result, the nuclear shielding also does not change, with the outer e- being protected by the same number of filled inner e- shells; and (c) The nuclear charge, or the number of p+, increases. As a result, the nucleus becomes more positive, drawing the e- in closer and reducing the atomic radius.

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Answer 2

Shielding effect decreases the effective nuclear charge experienced by electrons in the outermost shell, leading to an increase in atomic radius.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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