PERIODIC TABLE

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Across
  1. 5. The basic building block of all matter
  2. 8. Negatively charged particle
  3. 9. - Solid state of water
  4. 11. - has no protons
  5. 16. A row in the periodic table
  6. 17. - Iron, gold, silver
  7. 18. holds only two electrons
  8. 19. gases, helium, argon, neon, krypton, radon, xenon
  9. 21. A pure substance made from a single type of atom
Down
  1. 1. When a solid turns into a liquid
  2. 2. A ____ reaction is when a set of substances undergo a chemical change and form a different substance
  3. 3. These elements include fluorine, chlorine, bromine, iodine, and astatine
  4. 4. Number of protons in an element is the atomic ____
  5. 6. - drawn into fine wire
  6. 7. A metal that combines two or more elements such as bronze or steel
  7. 10. These particles are positive
  8. 12. A column in the periodic table
  9. 13. Center of an atom
  10. 14. Isotopes of the same element have a different number of these
  11. 15. A mixture where one substance dissolves in the other
  12. 17. - bent into shape
  13. 20. Metals conduct heat and ____ well