Across
- 2. Type of chemical reaction in which one substance breaks down into two or more substances
- 5. The temperature at which the pressure of the vapor of a liquid is equal to the external pressure acting on the surface of the liquid
- 7. The smallest particle of an element that still retains the properties of the element
- 10. Compound that has water chemically attached to its atoms and written into its chemical formula
- 12. Particle with an electric charge of 1-
- 13. Substance with atoms that are all alike
- 14. Sum of the number of protons and neutrons in an atom's nucleus
- 15. A substance that speeds up a chemical reaction
Down
- 1. Force that holds atoms together in a compound
- 3. State of matter where particles are aligned in a crystalline structure
- 4. Type of bond formed when atoms share electrons
- 6. Pattern of investifation procedures that helps scientist test a hypothesis
- 8. Positive particles in the nucleus of an atom
- 9. Anything that takes up space and has mass
- 11. Substances that slows down or prevents a chemical reaction from occurring