What is the maximum number of electrons in the following energy level? n = 2

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?

The three types is stress that act on earths rocks are compression, tension, and

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by