Multiple choice

The increasing order of effective nuclear charge is

  1. Na < Mg < Al < Si

  2. Mg < Na < Al < Si

  3. Mg < Mg < Si < Al

  4. Al < Mg < Na < Si

  5. Si < Al < Mg < Na
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A Correct answer
Explanation

On moving from left to right in a period, effective nuclear charge increases with increase in atomic number. Thus, correct order of effective nuclear charge is Na < Mg < Al < Si.

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