Question

periodic trends worksheet
use the periodic table and your knowledge of periodic trends to answer the following questions.

1. rank the following element in increasing atomic radius: carbon,aluminum, oxygen, and potassium.

Explanation:

Step1: Understand atomic radius trends

Atomic radius increases down a group and decreases across a period.

Step2: Locate elements on periodic table

Carbon (C) and oxygen (O) are in period 2. C is group 14, O is group 16. Aluminum (Al) is in period 3, group 13. Potassium (K) is in period 4, group 1.

Step3: Compare radii

Since across period 2, radius C > O. Down the groups, Al (period 3) has larger radius than C (period 2). K (period 4) has larger radius than Al (period 3).

Answer:

Oxygen < Carbon < Aluminum < Potassium