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A Lewis base in a coordination compound.

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How to make crystal glass

From history we know that the idea of creating crystal belongs to the British: they were the first to add lead oxides to the charge material, and as a result got glass with unusual “voice”, transparency and sparkling faces. Classical crystal contains 24% of lead oxide, but there are products with a higher content of up to 30%.

Pairing

A favourable interaction of two electrons with opposite m , values in the same orbital.

Metathesis Reactions

Reactions in which two compounds react to form two new compounds, with no changes in oxidation number. Reactions in which the ions of two compounds exchange partners.

 

Nonbonding Orbital

A molecular orbital derived only from an atomic orbital of one atom, lends neither stability nor instability to a molecule or ion when populated with electrons.

Cathode

Electrode at which reduction occurs in a cathode ray tube, the negative electrode.

Corrosion

Oxidation of metals in the presence of air and moisture.

Law of Conservation of Matter

There is no detectable change in the quantity of matter during an ordinary chemical reaction.

Nucleons

Particles comprising the nucleus, protons and neutrons.

Extensive Property

A property that depends upon the amount of material in a sample.

Flammable

A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).