CHEMICAL REACTIONS

3. Two or more atoms bonded together. same or different type.
6. Reaction A reaction in which two or more substances combine to form a single compound.
7. A reaction that occurs when one element replaces another element in one compound.
8. The process by which one or more substances undergo change to produce one or more different substances.
10. Two or more atoms bonded together. Different type.
11. states that mass cannot be created or destroyed in a physical or chemical change.
13. The substances formed from a chemical reaction.
14. A shorthand description of a chemical reaction using chemical formulas and symbols.
15. A shorthand notation for a compound or a diatomic element using chemical symbols and numbers.
16. symbol Set of letters that abbreviate the name of certain element.
17. A substance that speeds up a reaction without being permanently changed.
18. A substance that slows down or stops a chemical reaction.

1. A type of chemical reaction in which a compound and an oxidant react to produce heat and new products.
2. Number that is place before a chemical formula that indicates how many particles of that substance participate in the reaction.
4. The term used to describe a physical or chemical change in which energy is released or removed.
5. Reaction A reaction that occurs when two compounds exchange ions, producing two new compounds.
7. Small number next and down a chemical symbol that indicate how many atoms are present in that molecule.
8. The starting materials in a chemical reaction.
9. The term used to describe a physical or chemical change in which energy is absorbed.
12. A reaction in which a single compound breaks down to form two or more simpler substances.