Chemistry Fall Review

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Across
  1. 1. the only polyatomic cation
  2. 4. hard metals
  3. 7. the splitting of an atom
  4. 8. can be drawn into a wire
  5. 9. how close the data points are to each other
  6. 10. discovered the neutron
  7. 13. can be hammered into thin sheets without breaking
  8. 15. states that it is impossible to know the position and the velocity of an electron at the same time
  9. 17. how close a data point is to the accepted (true) value
  10. 19. this type of zero is never significant
  11. 23. inert family of elements
  12. 26. most reactive nonmetals
  13. 29. the energy required to remove an electron from a gaseous atom
  14. 30. used to measure the volume of a liquid
  15. 33. discovered that an atom is mostly empty space
  16. 35. ionic compounds are always _________! (36)
  17. 36. resemble a helium nucleus
  18. 38. shatter easily
  19. 39. period 3 group 14 (31)
  20. 40. number the number of protons and neutrons in an atom
Down
  1. 2. typically solids
  2. 3. generally good conductors of electricity but not heat
  3. 5. there are 1000 _____ in a gram
  4. 6. also known as the planetary model
  5. 11. arranged the elements in order of increasing atomic number
  6. 12. has the largest atomic radius in period 6
  7. 14. 1s2 2s2 2p2. (21)
  8. 16. used when chemicals get on your torso
  9. 18. numerals what we use to indicate the charge of a transition metal or post-transition metal
  10. 20. the distance from crest to crest or trough to trough
  11. 21. Father of the Modern Periodic Table
  12. 22. can only be stopped by concrete or a few centimeters of lead
  13. 24. the most electronegative atom
  14. 25. produced an ion with a +1 charge
  15. 27. the smallest subatomic particle
  16. 28. inversely related to wavelength
  17. 29. atoms of the same element that have different numbers of neutrons. (13)
  18. 31. subatomic particles with a positive charge
  19. 32. most reactive metals
  20. 34. mass/volume
  21. 37. the _________ principle states that electrons fill the lowest available energy level and sub level before filling the next one.