Which element has the largest atomic radius?
A) As
B) P
C) Se
D) Br
E) F

Name: Which element has the largest atomic radius? A) As B) P C) Se D) Br E) F
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Question

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Atomic radius increases down a group and decreases across a period. Arsenic (As) is located below phosphorus (P) in the same group, so it has a larger atomic radius than phosphorus. Selenium (Se), bromine (Br), and fluorine (F) are in the same period as arsenic but to the right, so they have smaller atomic radii.

Which Element Has the Largest Atomic Radius