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The Periodic Table

Chemistry

TermDefinition
Group A vertical column on the periodic table. Elements in the same group often share similar chemical properties because they have the same number of valence electrons.
Period (Chemistry) A horizontal row on the periodic table.
Family (Chemistry) A section of the Periodic Table. There are three major families - the metals, nonmetals, and metalloids.
Valence Electron An electron in an atom's outermost energy shell / orbital. These are the electrons that are involved in bonding.
Octet Rule An atom is stable when its valence electron shell is full, which is when it contains 8 electrons. The only exception to the octet rule is the first electron shell (H and He), which is complete with just 2 electrons.
Metal A family on the periodic table. Located on the left-hand side. Metals are silver, have luster, are good conductors, and are malleable.
Nonmetal No conductivity, no luster, brittle
Metalliod The semimetals located along the stair step on the periodic table. Metalloids have some characteristics of metals (shiny), but also nonmetals (brittle). They have lower conductivity than most metals.
Created by: cyclonescience