Charge on the central transition metal of [CU(NH3)4(H2O)2]2+

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 first element on the periodic table of elements is carbon. a. true b. false

How many moles of oxygen gas are produced from the decomposition of six moles of potassium