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? a. 2.48 × 105 ev c. 6.20 ev b. 0.161 ev d. 3.10 ev

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Which are forms of frozen water? check all that apply. dew frost hail rain sleet