Question

Name three elements which have seven electrons in their outermost shell. how do their non-metallic character and atomic size change down the group

Answer 1

fluorine, chlorine, bromine, iodine, astatine
group vii elements have 7 electrons on their outermost shell
as we go down the group
- the atomic size increases
-the outer shell gets farther from the nucleus
- the attraction between the nucleus and the electrons become weaker , they can easily gain an electron