Chemistry

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Across
  1. 1. many of the non metals and hydrogen
  2. 4. electrons: the electrons int the outermost shell of any element are called
  3. 9. Isotope is an _______ version of that atom
  4. 11. hundred fourteen: how many elements are known at the present time
  5. 12. what do neutrons have none of
  6. 14. the heaviest metal on the periodic table
  7. 16. what kind of elements are more stable when joined in a pair
  8. 19. there are seven elements that form _______ consisting of two atoms
  9. 21. atoms: compounds always contain the same ratio of __________
  10. 25. what is it called when there ia a number beside the element's symbol?
  11. 27. most of the elements on the periodic table occur as ______ at room tempertaure.
  12. 29. ________ consist of only kind of atom
  13. 30. dot structure: only shows the elements symbol and it's outer most electron shell
  14. 32. energy rings contain what
  15. 33. atomic mass is the number of protons and ______
  16. 34. The periodic table is a little like the alphabet of.......
  17. 36. how many electrons can the 3rd energy ring hold up too.
  18. 37. model: what shows all of the particles in the atom
  19. 38. bond: what kind of a bond occurs between a non metal and a metal
  20. 41. the lightest metal on the periodic table
Down
  1. 2. metals: what kind of metals are the most reactive metals
  2. 3. anything that takes up space and has mass
  3. 5. where are protons and neutrons found
  4. 6. matter is made up of....
  5. 7. the ________ & neutrons are found in the center of the area
  6. 8. table: is a list of all the elements that can build matter
  7. 10. adding a neutron makes an _________ of that atom
  8. 13. the most reactive non-metals are the __________
  9. 15. pure substances composed of two or more different elements that are chemically joined are called
  10. 17. electrons have _________ charge
  11. 18. the number of vaance electrons
  12. 20. element's ________ is an abbreviation for the element
  13. 22. metals: another name for group 5
  14. 23. lightest non-metal
  15. 24. what state of matter does iron appear at room temprature
  16. 26. rings: electrons live in something called shells or _________________
  17. 28. what are a good conductors of heat and electricity
  18. 31. number: is the number of protons and neutrons
  19. 35. only _______ and bromine can be found as liquid on the periodic table
  20. 39. gases: what kind of gases are stable and do not react with anything
  21. 40. a horizontal row on a period table