Problem: Of the following, which gives the correct order for the atomic radius for Mg, Na, P, Si, and Ar?A) Mg > Na > P > Si > Ar B) Ar > Si > P > Na > Mg C) Si > P > Ar > Na > Mg D) Na > Mg > Si > P > Ar E) Ar > P > Si > Mg > Na

FREE Expert Solution

We’re being asked to rank the given set of elements in order of decreasing atomic radius.

Atomic radius represents the distance from the nucleus to the outer shell of an element. 


The trend of the atomic radius in the periodic table:

decreases going from left to right of a period

increases going down a group

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Problem Details

Of the following, which gives the correct order for the atomic radius for Mg, Na, P, Si, and Ar?

A) Mg > Na > P > Si > Ar 

B) Ar > Si > P > Na > Mg 

C) Si > P > Ar > Na > Mg 

D) Na > Mg > Si > P > Ar 

E) Ar > P > Si > Mg > Na

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Our tutors have indicated that to solve this problem you will need to apply the Periodic Trends: Atomic Radius concept. You can view video lessons to learn Periodic Trends: Atomic Radius. Or if you need more Periodic Trends: Atomic Radius practice, you can also practice Periodic Trends: Atomic Radius practice problems.