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Atoms Test

TermDefinition
Valence Electrons the # of electrons in an atom’s outer energy level (shell)
Subscript number written to the lower right of a chemical symbol, identifying the number of atoms in a molecule
Group a vertical column of elements on the Periodic Table
Period a horizontal row of elements on the Periodic Table
Compound two or more elements chemically combined (ex: NaCl)
chemical reaction a process in which new substances with new physical and chemical properties are formed
An atom that gains an electron would have an oxidation number (overall charge) of -1
chemical formula a way of writing the name of a compound using chemical symbols
ion an atom with an electric charge (positive or negative)
periodic a repeating pattern
mixture two or more substances physically combined
When writing the chemical formula of a compound made of a metal and a non-metal, the symbol for the ______ element is written first. metal
In an Ionic bond, the “rule” that holds the atoms together in the bond opposites attract
all elements in the same group have the same number of __________ valence electrons
all elements in the same period have the same number of energy levels
metals are used for horseshoes because metals are malleable
metals can be used for electricity because metals are ductile
Noble Gases Can not form compounds
Metalloids have the properties of both metals and non-metals
An atom has the same number of protons and electrons so it is ___________________________ neutral
Created by: cbeltrani
 

 



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