Light of wavelength 200.0 nm is incident on a metal plate with a threshold wavelength of 400.0 nm What is the energy of the incident photon in electron volts?
2.48 x 10 eV
C. 6.20 eV
IN
b. 0.161 eV
d. 3.10 eV
a.

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule