Science Crossword By:Mack Fayant 9Mi

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Across
  1. 2. number of protons in the nucleus of one atom of an element
  2. 4. a reaction when 2 or more substances combine to make a new substance
  3. 6. description of how substances interacts with other substances
  4. 9. pure substance that cannot be broken down into other substances
  5. 10. group 1 in the periodic table not including hydrogen
  6. 11. group 17 elements in the periodic table; the most reactive non-metals
  7. 13. group 18 elements in the periodic table
  8. 14. pure substance formed when at least on metal and one non-metal combine
  9. 16. catalyst involved in a chemical reaction in living things
  10. 18. element that has both metallic and non-metallic properties
  11. 19. group of atoms joined by covalent bonds
Down
  1. 1. the vertical column in the periodic table
  2. 2. group 2 in the periodic table
  3. 3. positively charged center of an atom
  4. 5. the sum of the number of protons and neutrons
  5. 6. combination of symbols that represents a compound
  6. 7. the smallest part of an element
  7. 8. change that does not change the state of the reactant
  8. 12. mass of one atom of an element
  9. 15. dull brittle element that does not conduct electricity
  10. 17. shiny malleable ductile element that conducts electricity
  11. 19. anything that has mass and occupies a space