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A term used to describe molecules and polyatomic ions that have one atom in the center and four atoms at the corners of a square.

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Emission Spectrum

Spectrum associated with emission of electromagnetic radiation by atoms (or other species) resulting from electronic transitions from higher to lower energy states.

 

Downs Cell

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

Meniscus

The shape assumed by the surface of a liquid in a cylindrical container.

Radical

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

Hydration

Reaction of a substance with water.

Coulomb

Unit of electrical charge.

Mother Nuclide

Nuclide that undergoes nuclear decay.

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Can water burn?

It’s known that water consists of atoms of molecules of oxygen and hydrogen. Since any compound with oxygen indicates the ability of the substance to burn, water is no exception. Thus, water has a surprising property of already "burnt out" compound.

Deuterium

An isotope of hydrogen whose atoms are twice as massive as ordinary hydrogen,deuterion atoms contain both a proton and a neutron in the nucleus.