The delivery route for a mail truck is pictured below. Each square represents a city block, and the path of the truck is represented by arrows. The truck began and ended at the same location What was the displacement of the mail truck

Elements in group viiia (also known as group 18, or the noble gases) have similar properties because they all have a. the same number of electron shells b. full octets c. the same number of valence electrons d. the same number of electrons needed to fill their octet