Answer
See explanation
Work Step by Step
Atomic Radius Comparison
a. Nitrogen (N) vs Arsenic (As)
Trend: Atomic radius increases down a group.
Nitrogen is in period 2, arsenic in period 4.
Larger radius: Arsenic (As)
b. Silicon (Si) vs Sulfur (S)
Trend: Atomic radius decreases across a period (left to right).
Both are in period 3, but silicon is to the left of sulfur.
Larger radius: Silicon (Si)
c. Fluorine (F) vs Phosphorus (P)
Fluorine is in period 2, phosphorus in period 3.
Trend: Atomic radius increases down a group.
Larger radius: Phosphorus (P)
