Chemistry Study Guide

1234567891011121314151617181920212223242526
Across
  1. 3. any group of rare gases that include helium, neon, etc.
  2. 6. regions of space outside the nucleus of an atom.
  3. 9. a pure substance that has only one kind of atom in it.
  4. 10. mass is an isolated system, is neither created nor destroyed by chemical reactions or physical transformations.
  5. 13. an element intermediate in properties between the typical metal and nonmetal.
  6. 14. when two atoms of different elements combine.
  7. 17. no electric charge, part of the nucleus of all atoms except hydrogen atoms.
  8. 18. Russian chemist who created the periodic table.
  9. 21. atomic particles that move around the nucleus of an atom, carry negative charge.
  10. 23. the substance(s) that made the change.
  11. 24. when two or more atoms combine.
  12. 25. the mass of an atom usually expressed in these units.
  13. 26. (on the P.T.) row of elements.
Down
  1. 1. the ______ used to show what an element is.
  2. 2. a small particle of matter that is part of the nucleus of an atom.
  3. 4. occurred when energy is absorbed making the object cooler.
  4. 5. the positively charged center of the atom.
  5. 7. smallest particle with a positive chard.
  6. 8. a chemical element that lacks the characters of a metal.
  7. 11. the electrons in the outer most orbital.
  8. 12. represents the numbers of protons in the nucleus.
  9. 15. the resulting substance from the reactant.
  10. 16. a substance that usually has a shiny apperance, good conductor of electricity and heat.
  11. 19. occurred when energy is released in the form of heat.
  12. 20. (on the P.T.) column of elements.
  13. 22. is a reaction that occurred in which a layer of metal is bonded to the surface of another substance, which is usually another metal.