why cant hydrogen and chlorine molecules that have only one atom each cannot account for the observed behavoir

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

All motion is caused by force? true or false