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A series of very closely spaced, nearly continuous molecular orbitals that belong to the crystal as a whole.

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Peroxide

A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22

Organic Chemistry

The chemistry of substances that contain carbon-hydrogen bonds.

Shielding Effect

Electrons in filled sets of s , p orbitals between the nucleus and outer shell electrons shield the outer shell electrons somewhat from the effect of protons in the nucleus, also called screening effect.

Cis-

The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.

Absolute Zero

The zero point on the absolute temperature scale, -273.15°C or 0 K, theoretically, the temperature at which molecular motion ceases. The concept of an absolute zero temperature was first deduced from experiments with gases. When a fixed volume of gas is cooled, its pressure decreases with its temperature. Absolute zero physically possesses quantum mechanical zero-point energy.

Periodicity

Regular periodic variations of properties of elements with atomic number (and position in the periodic table).

Vapor Pressure

The particle pressure of a vapor at the surface of its parent liquid.

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.

Electromotive Series

The relative order of tendencies for elements and their simple ions to act as oxidizing or reducing agents, also called the activity series.

Ore

A natural deposit containing a mineral of an element to be extracted.