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

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.