General chemistry

General chemistry

Contributors in General chemistry

General chemistry

A thermodynamic property that can be used to predict whether a process will occur spontaneously at constant volume and temperature. Helmholtz free energy A is defined as A = U - TS where U, T and S ...

Hertz

Chemistry; General chemistry

The SI unit of frequency , equal to one cycle of the wave per second (s-1).

Hund's rule

Chemistry; General chemistry

A rule of thumb stating that subshells fill so that the number of unpaired spins is maximized, or "spread them out and line them up."

Lewis structure

Chemistry; General chemistry

A model pioneered by Gilbert N. Lewis and Irving Langmuir that represents the electronic structure of a molecule by writing the valence electrons of atoms as dots. Pairs of dots (or lines) wedged ...

Newtonian fluid

Chemistry; General chemistry

A fluid whose viscosity doesn't depend on gradients in flow speed. Gases and low-molecular weight liquids are usually Newtonian fluids.

Non-Newtonian fluid

Chemistry; General chemistry

A fluid whose viscosity changes when the gradient in flow speed changes. Colloidal suspensions and polymer solutions like ketchup and starch/water paste are non-Newtonian fluids.

Pauli principle

Chemistry; General chemistry

No two electrons in an atom can have the same set of 4 quantum numbers. Because the n, , and m quantum numbers address a particular orbital, and because the ms quantum number has only two possible ...