Magnetic quantum number (ml)
The third quantum number, defining the particular orbital of a subshell in which an electron
resides. It conveys information about the orientation of the orbital in space (e.g., px versus py).
Manometer
Manometer
An instrument used to measure the pressure of a gas.Mass
Mass
A physical property representing the amount of matter in a given sample.Mass defect
Mass defect
The difference between the sum of the masses of neutrons and protons forming a nucleus and
the mass of that nucleus; the mass equivalence of binding energy, with the two related via the
equation E = mc^2.
Mass number
Mass number
The total number of protons and neutrons in a nucleus.Maxwell-Boltzmann distribution
Maxwell-Boltzmann distribution
The distribution of the molecular speeds of gas particles at a given temperature.Melting point