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, sc, li b k, ca, rb c k, cs, mg d k, ca, sr

Explanation:

Elements in the same group (vertical column) of the periodic table have similar physical and chemical properties. Let's analyze each option:

• Option A: K (Potassium) is in Group 1, Sc (Scandium) is in Group 3, Li (Lithium) is in Group 1. Sc is in a different group.
• Option B: K (Group 1), Ca (Group 2), Rb (Group 1). Ca is in a different group.
• Option C: K (Group 1), Cs (Group 1), Li (Group 1). All are in Group 1.
• Option D: K (Group 1), Ca (Group 2), Sr (Group 2). K is in a different group.

Answer:

C. K, Cs, Li