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Group of atoms remaining after a hydrogen atom is removed from the aromatic system.

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Downs Cell

Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.

Two chemistry egg tricks

The French have a saying: "You cannot cook an omelet without breaking eggs."Chemists hearing this proverb totally disagree. There is nothing easier than cleaning an egg without breaking its shell.
Probably our readers have already guessed how to do this, as it’s known that the hard shell of the egg is carbon dioxide, like chalk and marble.

Weak Electrolyte

A substance that conducts electricity poorly in a dilute aqueous solution.

Colloid

A heterogeneous mixture in which solute-like particles do not settle out.

Fast Neutron

A neutron ejected at high kinetic energy in a nuclear reaction.

Chain Termination Step

The combination of two radicals, which removes the reactive species that propagate the change reaction.

Covalent Compounds

Compounds containing predominantly covalent bonds.

Reverse Osmosis

Forcing solvent molecules to flow through a semipermable membrane from a concentated solution into a dilute solution by the application of greater hydrostatic pressure on concentrated side than the osmotic pressure opposing it.

Atomic Number


Integral number of protons in the nucleus, defines the identity of element.
 

Entropy

A thermodynamic state or property that measures the degree of disorder or randomness of a system.