Back to top . O Orbital Representation of electron cloud. In chemistry, a compound containing carbon. Back to top . P Phase One of the three normal states of matter, solid, liquid, or gas, depending on the level of organization between particles.
Higher values correspond to weaker acids or bases.
Planck Constant Numerical value expressing the amount of uncertainty which must be present in any concurrent measurement of a particle's position and momentum. Potential Energy Surface a mathematical relationship between different molecular geometries and their corresponding single point energies. Primary quantum number Number used in electron structure notation, eg 1s, 2s, etc. Corresponds to the orbit in the Bohr atom where an electon would be found. Probability A number between one and zero which denotes how likely an event is to happen.