Interactions of Matter

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Across
  1. 3. his arrangement of elements became known as the periodic table
  2. 5. elements that have some properties of metals and some properties of nonmetals
  3. 9. number written below and to the right of chemical symbols
  4. 10. positively charged particle
  5. 13. smallest particle into which an element can be divided
  6. 15. at higher ________________, there are more reactants in a given volume
  7. 16. number number of protons in the nucleus of an atom
  8. 17. number placed in front of a chemical formula
  9. 19. gases found in Group 18
  10. 21. able to be formed into different shapes
  11. 22. element from atomic number 90 to atomic number 103
  12. 25. substance formed in a chemical reaction
  13. 26. substance that changes the rate of a chemical reaction without being used up
  14. 29. neutral particle found in the nucleus
  15. 30. small, dense center of an atom
Down
  1. 1. a type of catalyst found in living things
  2. 2. shiny and conduct heat and electricity well
  3. 4. reaction that releases energy
  4. 6. particles move ___________ at higher temperatures
  5. 7. metals found in Group 1
  6. 8. atoms that have the same number of protons but different numbers of neutrons
  7. 11. poor conductors of heat and electricity
  8. 12. substance that participate in a chemical reaction
  9. 14. reaction that required an input of energy
  10. 18. vertical column of elements
  11. 20. symbol abbreviation for an element
  12. 23. negatively charged particle
  13. 24. can be made into wires
  14. 27. horizontal row of elements
  15. 28. number total number of protons and neutrons in an atom’s nucleus