Question

Which of the following groups have seven valence electrons and are very reactive? (2 points)

Group of answer choices

Column 1 alkali metals

Column 2 alkaline earth metals

Column 17 halogens

Column 18 noble gases

Answer 1

The group that has seven valence electrons and is very reactive is **Column 17 halogens**. Halogens include elements like fluorine, chlorine, bromine, iodine, and astatine, all of which have seven valence electrons, making them highly reactive.