Spatial and Angular Momentum Numbers
To completely describe an electron in an atom, four quantum numbers are needed: energy, angular momentum, magnetic moment and spin.
Read more about this topic: Quantum Number
Famous quotes containing the word numbers:
“I had but three chairs in my house; one for solitude, two for friendship; three for society. When visitors came in larger and unexpected numbers there was but the third chair for them all, but they generally economized the room by standing up.”
—Henry David Thoreau (1817–1862)