What does the angular-momentum quantum number, l, describe? answer choices:  a. The clockwise or counterclockwise spin of an electron. b. The spatial orientation of an electron's orbital. c. The type of electron. d. The energy of an electron and the size of an orbital. e. The shape of an electron's orbital.

None

12.What is an emission line spectrum?     A.a visual representation of the range of energy emitted by the protons within an atom when they are subjected to an external energy source   B.a visual representation of the properties of waves, including their wavelength, frequency, amplitude, period, and speed   C.a visual representation of all the forms of electromagnetic radiation arranged sequentially by wavelength and frequency   D.a visual representation of the range of energy emitted by the electrons within an atom when they are subjected to an external energy source

Arrange the following three frequencies of light in order of increasing energy per photon. a. 100 MHz b. 10 MHz c. 100 GHz