Chemistry

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