In lab, a student observes an unknown substance dissolve in water and its mass remains the same. Which law is the student thinking of

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.