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Glossary Of Terms:


Atom

A single unit of an element.  Atoms are comprised of a positively charged nucleus, containing protons and neutrons, surrounded by electrons equal in number to the protons.


Atomic Mass

Also known as atomic weight, this is an average weight for an atom of a particular element.


Atomic Number

The number of protons in the nucleus of an atom. This number determines the electronic configuration, and thus the chemical properties of the element.


Atomic Radius

Half of the distance between corresponding atoms in a solid element.


Boiling Point

Considered the temperature that a liquid becomes gaseous.


Bond

A force of attraction between two atoms or ions in molecules. Bond types include covalent, ionic, metalic and hydrogen bonds.


Element

A chemical which is pure. The name for all the atoms with the same number of protons.


Group

A series of elements that have similar properties compiled in up-down columns in the periodic table.


Ion An atom with a surplus or deficit of electrons. It has a charge.


Isotope

Atoms with all the same number of protons and neutrons


Period

A series of groups of elements that change properties in unison. A horizontal row of the periodic table.


Periodic Table

An arangement of elements into periods of similar properties, or arranged by the arrangement of electrons into the various shells and orbitals.

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