Chemical Reactions

2. The law of _______ of mass states mass is neither created nor destroyed.
5. What is a sign of a chemical reaction when baking soda and vinegar are mixed?
7. What indicates the number of atoms of an element within a chemical formula?
10. A change in this can show that a chemical reaction has taken place—like when a metal rusts.
12. A change in this is often a sign of a chemical reaction, such as burning wood releasing heat.
14. The number placed before a molecule to balance a chemical equation is called a...
17. The type of equation that represents a chemical reaction using symbols.
18. What is a sign of a chemical reaction when you activate a glow stick by bending it?

1. When mixing baking soda and vinegar it give off a strong ______ which is a sign of a chemical reaction.
3. A representation of a chemical reaction using chemical formulas and symbols.
4. The bubbles formed during a chemical reaction indicate the production of this.
6. A solid that forms and settles out of a liquid mixture.
7. An abbreviation for an element on the periodic table.
8. The new substances that are formed in a chemical reaction.
9. An equation is this when the number of atoms of each element is the same on both sides.
11. The scientific principal that states mass is neither created nor destroyed in a chemical reaction.
13. The original substance that reacts in a chemical reaction.
15. A word to describe something that has undergone a chemical change.
16. A change in color or the production of bubbles or light are indications of a chemical _______.