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An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

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Henry's Law

The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.

Neutron

A neutral subatomic particle having a mass of 1.0087 amu.

First Law of Thermodynamics

The total amount of energy in the universe is constant (also known as the Law of Conservation of Energy) energy is neither created nor destroyed in ordinary chemical reactions and physical changes.

Electrophile

Positively charged or electron-deficient.

Alkynes

Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.

Dry Cells

Ordinary batteries (voltaic cells) for flashlights. radios, and so on, many are Leclanche cells.

Chain Reaction

A reaction that, once initiated, sustains itself and expands. This is a reaction in which reactive species, such as radicals, are produced in more than one step. These reactive species, radicals, propagate the chain reaction.

 

Nucleus

The very small, very dense, positively charged center of an atom containing protons and neutrons, as well as other subatomic particles.

Free Energy Change

The indicator of spontaneity of a process at constnt T and P. If delta-G is negative, the process is spontaneous.

Haber Process

A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.