Chemistry

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