Across
- 1. Formed when two or more elements are chemically bonded during a chemical reaction.
- 3. A number placed in front of a chemical symbol or formula that represents the number of molecules.
- 6. A reaction that absorbs heat from its surroundings, causing the temperature to decrease.
- 9. The number of atoms of each element in a compound.
- 10. Chemiluminescence is the production of __________ by a chemical reaction.
- 11. During a chemical reaction, formation of gas creates _____________.
- 14. Process by which one or more substances change to produce one or more different substances.
- 15. A combination of symbols and chemical formulas used to describe what happens in a chemical reaction.
Down
- 2. A solid substance that forms and separates from a liquid and often settles to the bottom of a liquid reaction.
- 4. Banana change from green to yellow to brown.
- 5. A substance that undergoes change during a chemical reaction. The starting materials.
- 7. Formed when two or more atoms join together chemically.
- 8. A substance produced during a chemical reaction. The end result of the reaction.
- 12. A number written below and to the right of a chemical symbol that shows the number of a specific type of atom present.
- 13. A reaction that releases heat into its surroundings, causing the temperature to increase.