If anyone is 13 or 12 will y’all go out with me?

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)

Which is mostly likely why many scientists reject the cold fusion theory

Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.