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chemistry
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25
Chemistry
7th Grade
12/02/2007

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Term
periodic table
Definition
table of elements
Term
period
Definition
a row in the periodic table
Term
group
Definition
a column in the periodic table
Term
periodic law
Definition
pattern of repeating properties in the periodic table
Term
luster
Definition
the shininess in an element
Term
malleability
Definition
the flexibility in an element
Term
valence electron
Definition
is an electron that is in the highest leval of energy of an atom
Term
alkali metals
Definition
elements in group 1A
Term
alkaline earth metals
Definition
elements in group 2A
Term
halogens
Definition
elements in group 7A
Term
noble gases
Definition
elements in group 8A
Term
inert
Definition
inactive, a property of argon
Term
ion
Definition
an atom with either pos or neg charge
Term
anion
Definition
an atom with a neg charge
Term
cation
Definition
an atom with a pos charge
Term
ionic bond
Definition
the bond between a metal and nonmetal ion
Term
cavalent bond
Definition
the bond between pairs of electrons on an wtom between another
Term
chemical formula
Definition
a notation that shows what element a compound contains and the ration of the atom or ions
Term
molecule
Definition
a subatmic particle made of two atoms
Term
atom
Definition
a subatomic particle, the basic subatmic particle
Term
polyatomic ion
Definition
a covalenty bonded group of atoms that has a positive or negatiove charge and acts as a unit
Term
metallic bond
Definition
the bond of a metal cation and the shared electrons that surround it
Term
alloy
Definition
a mixture between 2 atoms which at least one is a metal
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