Across
- 1. system of easy-to-see warning symbols on hazardous materials
- 4. neutral particle in the nucleus of an atom
- 8. metals group 1 elements in the periodic table, not including hydrogen; the most reactive of the metals
- 9. mixture mixture in which the different substances that make up the mixture are visible
- 12. substance that reacts with another substance
- 15. change of state from a solid to a liquid
- 17. change of state from a solid to a gas or from a gas to a solid
- 18. number number of protons in the nucleus of one atom of an element
- 19. neutral particle made up of a nucleus containing protons and neutrons
- 20. pure substance that cannot be broken down into other substances
- 21. horizontal row of elements in the periodic table
Down
- 2. anything that has mass and occupies space
- 3. cloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated
- 4. gases group 18 elements in the periodic table
- 5. homogeneous mixture
- 6. mass of a substance that can dissolve in a given amount of solvent to
- 7. dull, brittle element that does not conduct electricity
- 9. element that has both metallic and non-metallic properties
- 10. change change that results when two or more substances react to create a different substance or substances
- 11. amount of mass in a given volume of a substance
- 13. solution solution in which water is the solvent
- 14. positively charged particle in the nucleus of an atom
- 16. vertical column of elements in the periodic table
- 21. substance substance made of only one kind of matter