I can’t with Tik. Tok it’s getting sad now

State two physical properties of ionic compound

The p sub shell can hold up to 8 electrons in an atom. true or false?

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?