Across
- 2. Horizontal rows on the periodic table.
- 6. Elements that are brittle, dule, and poor conductors of electricity.
- 7. Elements that are hard, shiny, and good conductors of electricity.
- 8. A change that does not change a substance's chemical composition.
- 10. Properties that can only be observed by changing the chemical composition of the substance.
- 13. A substance made of two or more different types of elements.
- 15. A moderately reactive group of metals.
- 19. Is not matter, but can cause a change in matter.
- 20. A change that does change a substance's chemical composition.
- 21. Vertical columns on the periodic table.
- 22. A nonreactive group of nonmetals.
- 25. A positively charged subatomic particle that is found in the nucleus of an atom.
- 26. A pure substance that cannot be broken down into simpler substances.
- 27. The small, dense, centre of an atom.
Down
- 1. Average weight of an atom.
- 3. The special element.
- 4. The electrons in the outermost energy shell.
- 5. A negatively charged subatomic particle that orbits the nucleus of an atom.
- 9. Is equal to the number of protons and electrons.
- 11. Elements that have properties of both metals and nonmetals.
- 12. A highly reactive group of metals.
- 14. A highly reactive group of nonmetals.
- 16. Mr. McPhee's favourite element.
- 17. Properties that can be observed without chemically changing the substance.
- 18. The outermost energy shell in a Bohr model.
- 23. A neutral subatomic particle found in the nucleus of an atom.
- 24. The father of the periodic table.