Across
- 3. made up of hydrogen and oxygen
- 4. are able to be drawn into thin wires
- 7. chemical symbol are a shorthand way to write the names of the..
- 9. orbit around the nucleus an have negative charge
- 11. made up of sodium and chlorine
- 12. a repeating pattern
- 13. makes 1% of the atmosphere
- 14. shorthand way of writing the names of...
- 18. are neutral
- 19. elements that have the properties of luster, ductility, and malleability
- 20. simple substances that cannot be broken down into simpler substances
Down
- 1. made up of carbon, oxygen and hydrogen
- 2. a horizontal row of elements in the periodic table
- 5. six elements that make up the last group in the periodic table of the elements
- 6. elements that have none of the properties of metals
- 8. shines
- 10. a vertical column of elements in the periodic table
- 15. number of protons found in the nucleus if atom
- 16. are positively charge
- 17. made up of copper and zinc