Question

Why basic element and diamagnetic and colourless?

Answer 1

Explanation:

Colors of transition metal compounds are due to two types of electronic transitions.

Due to the presence of unpaired d electrons, transition metals can form paramagnetic compounds.

Answer 2

Answer:

All the elements of group 1 form unipositive ions by loss of one valence electron. So they do not have any unpaired electrons in the ions. Group 2 elements also do not have any unpaired electrons in their divalent ions. Hence their compounds are colourless and diamagnetic.