Chemistry Vocabulary

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Across
  1. 2. a slow chemical change when oxygen reacts with metal.
  2. 4. combination of symbols that represent a compound
  3. 6. when two or more chemicals react to form a new substance.
  4. 8. experiments where material can escape
  5. 11. shows how many protons are in the nucleus of one atom in the element.
  6. 13. amu for short.
  7. 15. _______________ are formed when non-metals combine.
  8. 16. a reaction that absorbs heat energy.
  9. 17. an organized table of the elements
  10. 19. a fast reaction that occurs when oxygen reacts with a substance.
  11. 20. had a model that showed the atom looking like a solar system
  12. 22. believed matter was made up of water,fire,earth, and air
  13. 23. most stable and nonreactive elements in the periodic table.
  14. 24. liquid,gas,solid
  15. 25. new materials produce after the reaction.
Down
  1. 1. a reaction that releases heat energy.
  2. 3. chemical reaction that takes place in the cells in your body
  3. 5. _______ are shiny, malleable and ductile.
  4. 7. the mass of one atom in an element
  5. 9. colour,lustre,hardness
  6. 10. _____________ are formed when a non-metal and metal combine.
  7. 12. anything that has mass and occupies space.
  8. 14. experiments where no material can escape
  9. 18. a substance that can't be simplified.
  10. 21. the materials at the start of a reaction.