Chemistry Crossword

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Across
  1. 7. - carry a negative charge
  2. 8. number - the number of protons in the nucleus
  3. 9. (on the P.T.) - a column of elements in the periodic table of the chemical elements
  4. 10. - a substance that takes part in and undergoes change during a reaction
  5. 13. - the opposite of "exo"
  6. 15. - material that is dull, nonmalleable, fragile
  7. 16. Bohr- suggested that electrons move from one orbital to another
  8. 18. electron - the outermost shell of an atom
  9. 19. - a group of atoms bonded together
  10. 20. - everything is made up of these
  11. 21. - substance that is formed as the result of a chemical reaction
  12. 23. - found all over the periodic table
  13. 24. - a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
Down
  1. 1. - the space outside the nucleus of an atom where an electron is
  2. 2. - carry a positive charge
  3. 3. - to be deposited in solid form from a solution
  4. 4. Mendeleev - a Russian chemist, developed a periodic table of the chemical elements
  5. 5. (on the P.T.) - horizontal rows in the periodic table, the same number of electron shells
  6. 6. - a thing that is composed of two or more separate elements
  7. 11. - the release of heat
  8. 12. - properties are intermediate between those of metals and solid nonmetals
  9. 14. Gas - gaseous
  10. 15. - the center of an atom
  11. 16. - carry no electrical charge
  12. 17. of Conservation of Mass - mass in an isolated system, not destroyed by chemical reactions
  13. 22. - a mark or character