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At constant temperature and pressure, the volumes of reacting gases (and any gaseous products) can be expressed as ratios of small whole numbers.

 

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Acid Anhydride

Compound produced by dehydration of a carbonic acid. General formula is R--C--O--C--R. Chemical compound that reacts with water to form an acid and are usually oxides of nonmetallic elements.

Potential Energy

Energy that matter possesses by virtue of its position, condition or composition.

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

Molecular Equation

Equation for a chemical reaction in which all formulas are written as if all substances existed as molecules, only complete formulas are used.

Electrodes

Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Hydrometer

A device used to measure the densities of liquids and solutions.

Alkaline Battery

A dry cell in which the electrolyte contains KOH.

Do you know: some mosquitoes bite people because of their clothes

If you have ever been bitten by a mosquito, someone nearby surely gave you an explanation of why the nasty insect decided to spoil your day. Maybe they told you that you smelt good, or you had a certain type of blood or that in that shirt you looked like a potential victim.