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The correct order of the atomic radii of

Question:

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

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

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

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

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


Correct Option: , 4

Solution:

Atomic radii order : $\mathrm{C}<\mathrm{S}<\mathrm{Al}<\mathrm{Cs}$

Atomic radius of $\mathrm{C}: 170 \mathrm{pm}$

Atomic radius of S : $180 \mathrm{pm}$

Atomic radius of $\mathrm{Al}: 184 \mathrm{pm}$

Atomic radius of $\mathrm{Cs}: 300 \mathrm{pm}$

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