Question

matter, atomic structure, and the periodic table

which element has the largest atomic radius?

n
p
as
sb

Explanation:

Identify the elements

The given options are chemical symbols for Elements and Compounds:

• \(N\) (Nitrogen)
• \(P\) (Phosphorus)
• \(As\) (Arsenic)
• \(Sb\) (Antimony)

Locate on periodic table

These elements belong to Group 15 (pnictogens).
They are arranged vertically: \(N\) (Period 2), \(P\) (Period 3), \(As\) (Period 4), \(Sb\) (Period 5).

Apply periodic trends

Atomic radius increases down a group.
This is due to additional electron shells.

Compare atomic radii

\(Sb\) has the most electron shells.
Therefore, \(Sb\) has the largest atomic radius.

Answer:

• N
• P
• As
• Sb (Correct answer)