Which process requires energy for a nonspontaneous redox reaction to occur?

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)

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?