Question

Which one of the following is with the highest atomic size ? A) Sodium B) Aluminium C) Chlorine D) Oxygen

Answer 1

sodium has highest atomic size because of lesser effective nuclear charge.

Answer 2

Heya!!!


Here's ur answer..

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Number of shells in oxygen atom = 2
--------------------------- sodium - - - - - = 3
-------------------------- Aluminium - - - =3
---------------------------- chlorine - - - - = 3

So, atomic size is inversely proportional to number of Valence electrons.

So, sodium has highest atomic size.

Correct option is A)

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