1.1 What is Chemistry?

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http://www.ck12.org Chapter 27. Glossary


27.14 O


octahedral
Six atoms are evenly organized around a central atom.

octet rule
States that atoms will lose, gain or share electrons to achieve the electron configuration of the nearest noble
gas (8 valence electrons except for He with 2).

orbital
A three-dimensional region around the nucleus that indicates the probable location of the electron.

oxidation number
Used to describe the state of an element’s electrons as it undergoes a chemical change.

oxidation
Involves the loss of hydrogen, the gain of oxygen, or the loss of electrons.

oxidation-reduction reaction
Oxidation and reduction both occur within the same reaction- one or more atoms are oxidized while one or
more different atoms are reduced. Simply referred to as a redox reaction. There are 4 types of reactions are
combination, decomposition, displacement, and combustion.

oxidizing agent
Causes the oxidation of another species in the reaction.

oxyacid
Compounds comprised of at least one oxygen atom as part of their molecular structure.
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