Kforms the compound k₂o, which is an ionic compound that is brittle. identify another element, m, that is likely to form a brittle, ionic compound with the formula m₂o. justify your answer in terms of periodic trends.

The other element is Sodium.

Explanation:

We are given a chemical compound having formula

The oxidation state of potassium is +1. The group showing oxidation state as +1 is Group 1. Elements belonging to Group 1 are metals.

The oxidation state of elements belonging to same group have same number of valence electrons and thus shows same oxidation state.

Properties shown by metals:

But, there are some exceptions. Sodium and potassium belonging to Group 1 are brittle in nature. They can be easily cut with knife.

The chemical compound having formula , in which oxidation state of metal is +1 and is brittle in nature.

Hence, the other element will be sodium

a:

by the combination of an unlimited number of elements