Question

question 2
which pair of elements has the most similar properties?
i and ca
n and k
li and rb
li and cs

Explanation:

Elements in the same group of the periodic table have similar chemical properties. Lithium (Li), Rubidium (Rb), and Cesium (Cs) are all in Group 1 (alkali - metals). Among the given options, Li and Rb are in the same group and have more similar properties compared to the other pairs which are from different groups.

Answer:

Li and Rb