You have recently discovered a new element,and find that this particular element has seven electrons in its outer energy level.What does this information tell you about the reactivity of this element?

Question

Quizplus · Accepted Answer

Elements with seven electrons in their outer energy level are highly reactive because they only need one more electron to complete their valence shell and become stable. This is why elements with seven valence electrons are known as halogens and are highly reactive nonmetals.

You Have Recently Discovered a New Element,and Find That This