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A unit of energy in the SI system. One joule is 1 kg. m2/s2 which is also 0.2390 calorie.

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Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

Leclanche Cell

A common type of dry cell.

The most expensive metal in the world

Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.

Foam

Colloidal suspension of a gas in a liquid.

Cohesive Forces

All the forces of attraction among particles of a liquid.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Metal

An element below and to the left of the stepwise division (metalloids) in the upper right corner of the periodic table, about 80% of the known elements are metals.

Liquid Aerosol

Colloidal suspension of liquid in gas.

Hybridization

Mixing a set of atomic orbitals to form a new set of atomic orbitals with the same total electron capacity and with properties and energies intermediate between those of the original unhybridized orbitals.

Leveling Effect

Effect by which all acids stronger than the acid that is characteristic of the solvent react with solvent to produce that acid, similar statement applies to bases. The strongest acid (base) that can exist in a given solvent is the acid (base) characteristic of the solvent.