Sodium chloride conducts electricity when dissolved in water. what type of bond is present in nacl?

Which material produces static charge when rubbed ?

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)

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.