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, cs, frb k, ca, rbc k, sr, lid k, ca, sr

Explanation:

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

• Option A: K (Potassium), Cs (Cesium), Fr (Francium) are all in Group 1 (alkali metals).
• Option B: K (Group 1), Ca (Group 2), Rb (Group 1) - different groups.
• Option C: K (Group 1), Sr (Group 2), Li (Group 1) - different groups.
• Option D: K (Group 1), Ca (Group 2), Sr (Group 2) - different groups.

Answer:

A. K, Cs, Fr