Determine the frequency of light with a wavelength of 4.50 x 10-7 m.

The frequency of a photon of red light with wavelength 4.50 x 10−7m is 6.67 x 1014Hz

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom