Question

which element has the largest atomic radius?
o as
o n
o p
o sb

Explanation:

Step1: Recall atomic - radius trend

Atomic radius increases down a group in the periodic table.

Step2: Locate elements in periodic table

As (arsenic), N (nitrogen), P (phosphorus), and Sb (antimony) are all in Group 15. N is in the second - period, P is in the third - period, As is in the fourth - period, and Sb is in the fifth - period.

Step3: Determine the element with largest radius

Since atomic radius increases down a group, Sb has the largest atomic radius among them.

Answer:

Sb