Ionizing a hydrogen atom in its electronic ground state requires 2.179 x 10- 18 j of energy. the sun's surface has a temperature of ~ 6000 k and is composed, in part, of atomic hydrogen. is the hydrogen present as h(g) or h+ (g)? what is the temperature required so that the maximum wavelength of the emission of a blackbody ionizes atomic hydrogen? in what region of the electromagnetic spectrum is this wavelength found?