Question

the image below shows the first two columns of the periodic table. which of the following sets of elements has the most similar physical and chemical properties? a k, sr, li b k, ca, rb c k, cs, fr d k, ca, sr

Explanation:

Elements in the same group (column) of the periodic table have similar physical and chemical properties.

• Option A: K (Group 1), Sr (Group 2), Li (Group 1). Different groups.
• Option B: K (Group 1), Ca (Group 2), Rb (Group 1). Different groups.
• Option C: K (Group 1), Cs (Group 1), Fr (Group 1). Same group.
• Option D: K (Group 1), Ca (Group 2), Sr (Group 2). Different groups.

Answer:

C. K, Cs, Fr