Elements in the same vertical column share similar chemical properties. Which statement best explains this?
AThey have the same number of neutrons in their nucleus.
BThey have similar physical qualities.
CThey have identical numbers of electrons in the outermost level.
DThey were discovered in the same location.
AThey have the same number of neutrons in their nucleus.
BThey have similar physical qualities.
CThey have identical numbers of electrons in the outermost level.
DThey were discovered in the same location.