Across
- 4. Substance made of only one kind of matter, which has a unique set of properties
- 6. Pure substance that cannot be broken down into other substances; substance made up of only one type of atom
- 7. Change that results when two or more substances react to create a different substance of substances; the new substances have completely different properties from the original ones
- 9. substance that helps a chemical reaction to proceed more quickly
- 13. Pure substance formed when at least one metal and one non-metal combine
- 17. Pure substance formed when non-metals combine
- 18. The smallest part of an element that is representative of that element; a neutral particle made up of a nucleus containing protons and neutrons, and in which the number of electrons equals the number of protons
- 20. Change in the appearance or state of a substance that does not change the composition
- 22. Refers to the three common states in which matter can exist: solid, liquid, and gas
- 23. Mass of one atom of an element calculated from the total number of protons, neutrons, and electrons of that atom; measured in atomic mass units (amu)
- 24. Number of protons in the nucleus of one atom of an element
- 25. Chemical combination of two or more elements in a specific ratio
Down
- 1. Combination of pure substances; unlike a compound, the components of a mixture do not combine chemically and are not always in the same ratio
- 2. Invisible negatively charged particle that orbits the nucleus of an atom
- 3. Anything that has mass and occupies space
- 5. Description of how a substance interacts with other substances, such as acids; chemical properties are observable only when a chemical change occurs
- 8. Property that describes the physical appearance and composition of substance
- 10. Dull, brittle element that does not conduct electricity
- 11. Shiny, malleable, ductile element that conducts electricity
- 12. Neutral particle in the nucleus of an atom
- 14. A table in which the elements are organized by their physical and chemical properties
- 15. Workplace Hazardous Materials Information System; a system of easy-to-see warning symbols on hazardous materials
- 16. Characteristic that describes a particular substance (e.g., colour, lustre, melting point,crystal shape, solubility, density)
- 19. Element that has both metallic and non-metallic properties
- 21. Positively charged particle in the nucleus of an atom