As a substance changes phase from solid to liquid to gas the molecules become closer together a. true b. false

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

What three natural resources are found in the great lakes region