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Vocabulary for Chemistry

Chemical Reaction A reaction in which a new substance is formed with different properties from the original. Ex. Burning Wood
Products Those chemicals that are produced from the chemical reaction. (Ex: A+B->C+D -- C and D are the products.)
Law of Conservation of Matter (Mass) States that Matter can neither be created nor destroyed. In a chemical reaction, the mass of the reactants and the products will be equal.
Exothermic Exothermic Chemical ReactionOccurs when the chemical reaction releases heat. Products become warmer than the reactants.
Coeffecient This number that proeceeds the chemical formula and tells you the number of molecules in the compound
Subscript This number follows the element in a chemical formula and tells you the number of atoms for that particular element
Physical Reaction A reaction in which the form or appearance of a substance alters without changing its identity. Example: Water Boiling or Ice Melting.
Molecule Group of two or more atoms held by a strong bond
Reactants Those chemicals that start the chemical reaction. (Ex: A+B->C+D -- A and B are the reactants.)
Which number is the coefficient of in the chemical formula 2MgO? 2
How many molecules are in the chemical formula 2MgO? 2
How many elements are in the chemical formula 2MgO? 1
How many total atoms of Mg are in the chemical formula 2MgO? 2
What is the subscript of oxygen in 2MgO? 1
In the equation 2Mg + O2(subscript) = 2MgO, what is the product? 2MgO
Is the equation Mg + O2(subscript) = 2MgO balanced? No
Is the equation 2Mg + O2(subscript) = 2MgO balanced? Yes
Created by: amorris6