8. What causes the shielding effect to remain constant across a period? O The atomic radius increases.O Electrons are added to t
he same principal energy level. OElectrons are added to different principal energy levels. O The charge on the nucleus is constant.
2 answers:
<h3>
Option D(Last) :- </h3>
<em>The</em><em> charge on the nucleus is constant</em>.
<h3>Explanation:-</h3>
<em>The number of inner shell electrons being constant causes the shielding effect to remain constant across a period</em>
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<h3>Thank you:)</h3>
The number of inner shell electrons being canstant because the shielding is effected to remain constant across a period.
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