The correct order of the atomic radii of

Question:

The correct order of the atomic radii of $\mathrm{C}, \mathrm{Cs}, \mathrm{Al}$, and $\mathrm{S}$ is :

  1. $\mathrm{C}<\mathrm{S}<\mathrm{A} 1<\mathrm{Cs}$

  2. $\mathrm{S}<\mathrm{C}<\mathrm{Cs}<\mathrm{Al}$

  3. $\mathrm{S}<\mathrm{C}<\mathrm{Al}<\mathrm{Cs}$

  4. $\mathrm{C}<\mathrm{S}<\mathrm{Cs}<\mathrm{Al}$


Correct Option:

Solution:

On going down the group, size increases while going from left to right in a period size decreases, so order is $\mathrm{C}<\mathrm{S}<\mathrm{Al}<\mathrm{Cs}$.

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