Across
- 1. a number written below and to the right of a chemical symbol that shows the number of a specific type of atom present
- 5. a shorthand notation that uses chemical symbols and numbers as subscripts to represent the type and number of atoms that are present in the smallest unit of a substance
- 7. chemical formulas and symbols written to represent a reaction
- 9. the process by which one or more substances change to produce one or more different substances
- 11. the smallest particle of an element; made of protons, neutrons and electrons
- 12. a substance produced during a chemical reaction
- 13. - a substance that takes part in and undergoes change during a chemical reaction
Down
- 2. a number placed in front of a chemical symbol or formula that represents the number of molecules
- 3. to prevent the loss of something
- 4. scientific law stating that the mass of all reactants must equal the mass of all products; matter is neither created nor destroyed
- 6. a measure of how much matter is present in a substance
- 8. physical and chemical characteristics of matter used to describe or identify a substance
- 10. the simplest unit of a chemical compound that can exist, formed when two or more atoms join together chemically