Question

which of the following has the smallest atomic radius? radon, rn lodine, i nitrogen, n selenium, se

Explanation:

Step1: Recall periodic trends

Atomic radius decreases across a period (from left to right) and increases down a group in the periodic table.

Step2: Analyze positions

• Radon (Rn) is in period 6.
• Iodine (I) is in period 5.
• Nitrogen (N) is in period 2.
• Selenium (Se) is in period 4.

Since Nitrogen is in the earliest period among these elements, it has the smallest atomic radius.

Answer:

Nitrogen, N