Section 1 Chemical Changes - Richmond County School System

Section 1

Chemical Changes

Essential Questions

What are the reactants and products in a chemical

reaction?

Is mass conserved in a chemical reaction?

Why are chemical equations important?

How do you balance a chemical equation?

Review Vocabulary

chemical formula: shorthand that gives the elements

in a compound and their ratios

Review Vocabulary

chemical formula: shorthand that gives the elements

in a compound and their ratios

Law of Conservation of Mass

The Law of Conservation of Mass states: that

mass is neither created nor destroyed in

any chemical reaction. Therefore balancing

of equations requires the same number of

atoms on both sides of a chemical reaction.

The number of atoms in the Reactants must

equal the Number of atoms in the Products

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