Across
- 1. is a chemical change in which an element or a compound reacts with oxygen, often producing energy in the form of heat and light.
- 7. is a substance that speeds up the reaction but is not used up in the reaction.
- 8. is a chemical equation that does not indicate the relative amounts of the reactants and products.
- 11. is a chemical change in which two or more substances react to form a single new substance.
- 12. is a chemical change in which one element replaces a second element in a compound.
- 13. small whole numbers that are placed in front of the formulas in an equation in order to balance it
- 14. a chemical change involving an exchange of positive ions between two compounds.
Down
- 2. an equation that shows dissolved ionic compounds as dissociated free ions.
- 3. is a chemical change in which a single compound breaks down into two or more simpler products.
- 4. is a representation of a chemical reaction
- 5. An ion that appears on both sides of an equation and is not directly involved in the reaction
- 6. each side of the equation has the same number of atoms of each element and mass is conserved.
- 9. lists metals in order of decreasing reactivity.
- 10. is an equation for a reaction in solution that shows only those particles that are directly involved in the chemical change.