Oxidation of iron to form rust

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

What are the 4 phases of matter in order of increasing engery content?

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?