During an experiment, distilled water was placed in a sealed container and the container was heated gradually . Describe the system when it reaches phase equilibrium

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)

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

What element has similar physical and chemical properties as boron.