Rank from most to least number of valence electrons. to rank items as equivalent, overlap them. arrange the elements in decreasing order of the number of valence electrons. kr ca ba br li f as sb o al cl si na ar sr

Explanation: Valence electrons are defined as the outermost electrons present in an atom that are easy to loose. It can be easily recognized from the electronic configuration.

Electronic configuration of , Number of valence electrons = 8Electronic configuration of , Number of valence electrons = 2Electronic configuration of , Number of valence electrons = 2Electronic configuration of , Number of valence electrons = 7Electronic configuration of , Number of valence electrons = 1Electronic configuration of , Number of valence electrons = 7Electronic configuration of , Number of valence electrons = 5Electronic configuration of , Number of valence electrons = 5Electronic configuration of , Number of valence electrons = 6Electronic configuration of , Number of valence electrons = 3Electronic configuration of , Number of valence electrons = 7Electronic configuration of , Number of valence electrons = 4Electronic configuration of , Number of valence electrons = 1Electronic configuration of , Number of valence electrons = 8Electronic configuration of , Number of valence electrons = 2

Elements arranged in decreasing order of their valence electrons are: