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Section 19B, Physical Science

Across
One of the five signs that shows a chemical change has taken place.
When a solid product settles out of a solution following a reaction.
The second step in writing a chemical equation, this is written down.
Neither a reactant nor a product but it is added to a reaction in order to increase the reaction rate.
In a chemical equation, the arrow always points towards the ____________.
Compounds or elements on the right side of the arrow in a chemical equation
The Law of the Conservation of ___________ states that the amount of matter before a reaction must equal the total amount of matter after a reaction.
The number of atoms of each element in the reactants equals the number of atoms of each element in the product in this type of chemical equation.
In a chemical reaction, _________ are not destroyed or changed but rearranged into different substances.
Down
The first step in writing a chemical equation, you write this down.
In a chemical reaction, both the kinds of atoms and their arrangement changes.
The number of atoms of each element in the reactants does not equal the number of atoms of each element in the product in this type of chemical equation.
What can be changed in order to balance an equation.
Elements on the left side of the arrow in a chemical equation
The third step is to ____________ the equation.
Represented by the special symbol, (l), to show an element's state of matter.