Problem: Which of these elements has the  smallest  atomic radius?a) chlorineb) brominec) iodined) fluorine 

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We’re being asked to identify the element that has the smallest atomic radius.


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

Trend of 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

Which of these elements has the  smallest  atomic radius?

a) chlorine

b) bromine

c) iodine

d) fluorine 

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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.

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Based on our data, we think this problem is relevant for Professor Tai's class at Thomas Jefferson University.