What happens to elemental copper when it loses two electrons? A. It is reduced to Cu2+.
B. It is oxidized to CU2+.
C. It is reduced to Cu2-.
D. It is oxidized to Cu2-.

What are the similarities of physical and chemical change ?

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?