Question

8. What causes the shielding effect to remain constant across a period? O The atomic radius increases.O Electrons are added to the same principal energy level. OElectrons are added to different principal energy levels. O The charge on the nucleus is constant.​

Answer 1

Option D(Last) :-

The charge on the nucleus is constant.

Explanation:-

The number of inner shell electrons being constant causes the shielding effect to remain constant across a period

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Answer 2

The number of inner shell electrons being canstant because the shielding is effected to remain constant across a period.