If the atomic radius of chlorine is 99 pm, what is the atomic radius of potassiu

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Question: If the atomic radius of chlorine is 99 pm, what is the atomic radius of potassium in pm?

Options:

Correct Answer: 227 pm

Solution:

Atomic radius increases down a group. Potassium (K) has a radius of approximately 227 pm.

If the atomic radius of chlorine is 99 pm, what is the atomic radius of potassium in pm?

If the atomic radius of chlorine is 99 pm, what is the atomic radius of potassium in pm?

Step 1: Understand that atomic radius is the size of an atom.
Step 2: Know that elements are organized in the periodic table in groups (columns).
Step 3: Recognize that as you move down a group in the periodic table, the atomic radius increases.
Step 4: Identify that chlorine (Cl) is in group 17 and potassium (K) is in group 1.
Step 5: Since potassium is below chlorine in the periodic table, its atomic radius will be larger.
Step 6: Look up the atomic radius of potassium, which is approximately 227 pm.

Atomic Radius Trends – The atomic radius increases as you move down a group in the periodic table due to the addition of electron shells.