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Chemistry
8th Grade
01/10/2012
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Term
Symbol
 Definition
are a shorthand way of writing elements. Ex. C, H, O, CI, AL, Ca.
Term
Compound
 Definition

When 2 or more elements combine during a chemical reaction, a _______ forms.

 Ex. NaCL, C6H12O6 Fe2Oa3, H20.
Term
Chemical Formula
 Definition
are a shorthand way of writing compounds. Ex. NH3 (Ammonia) AgNO3 (Silver Nitrate)
Term
Coefficient
 Definition
is a number placed in front of a chemical formula. It tells the number of molecules making up the chemical formula. Multiply all the elements behind the coefficient by the coefficient. Ex. 2H2O - 2 x H2 2xO = 4 Hydrogen atoms and 2 Oxygen atoms.
Term
Sodium Hydroxide
 Definition

NaOH

 
Term
Glucose
 Definition
C6H12O6
Term
Magnesium Hydroxide
 Definition
Mg(OH)2
Term
Calcium Phosphate
 Definition
Ca3(PO4)2
Term
Hygrogen Phosphate
 Definition
3H3PO4
Term
Carbon Dioxide
 Definition
5CO2
Term
Sodium Phosphate
 Definition

4Na3(PO4)

 
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