Which element had the smallest atomic radius

As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the element, and francium is the largest.

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helium is the answer

Explanation:

helium is the smallest element in francium is the largest hope this helps

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >