Question

an element q has 2 electrons in its outer outermost shell amd an element z has 7 electrons in its outer most shell. which formula would most likely be stable

Answer 1

Answer:

The answer to your question is XY₂

Explanation:

Process

1.- If an element has two electrons in its outermost shell it means that it has a valence of 2.

This element is represented by   X⁺²

2.- If an element has seven electrons in its outermost shell it means that its oxidation number is -1.

This element is represented by     Y⁻¹

3.- Now, join the elements

                               X⁺²  +   Y⁻¹   ⇒    XY₂