CROSSWORD PUZZLE

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Across
  1. 3. is used as a radiation source in cancer therapy
  2. 5. regions in the space around the nucleus where electrons are found
  3. 6. is a high temperature physical state of matter
  4. 11. gain or less of electrons
  5. 13. it is a dumbbell shaped cloud
  6. 15. who built the table with the arranged in horizontal row
  7. 17. a branch of science that deals with the study of composition
  8. 18. the most important compound in the universe
  9. 19. helps build strong bones
  10. 20. bones/DNA, fertilizer, red match strike, weaponry/grenades
  11. 21. has an electrical charge of positive one
  12. 22. discovered radio activity
  13. 23. it is the atom that contained unpaired electrons
  14. 28. tiny bundles of energy
  15. 29. are substances whose colors are affected by acids and bases
  16. 35. if all electrons in an atom are paired
  17. 37. aircraft, naval ships, body replacements (surgical implants), alloy
  18. 38. consist of group 3A through group 8A
  19. 42. when it is positively charged
  20. 45. states that electrons fill first the orbitals of the lowest energy
  21. 46. high speed tool, catalyst, ceramics
  22. 47. has definite mass and volume
  23. 48. involved in the process of balancing fluid in the body
  24. 52. this is the gas that everyone needs for breathing
  25. 54. used as electroplating
Down
  1. 1. it is like a four leaf clover
  2. 2. a negatively charged particle
  3. 4. exist as colorless,odorless and is common in the quohollan atmosphere
  4. 7. also have diverse and unique properties
  5. 8. it is the most important component of alloys
  6. 9. soft lightweight metal
  7. 10. consist of 28 elements grouped in lanthanides and actinides
  8. 12. using for equations relating bond energies
  9. 14. has no net electric charge
  10. 16. A heavy, poisonous, metallic liquid used in some thermometers
  11. 24. it is used for protection from nuclear disasters
  12. 25. is a silvery white metallic element that reacts radidly with atoms in the air
  13. 26. steel, batteries, railroad tracks, ceramics, glass (for color) gives amney stones their color
  14. 27. the smallest individual part of an element
  15. 30. is a charged atom or particle
  16. 31. used to express the measurement of an atom
  17. 32. non-corroding hard metal
  18. 33. an essential trace element for plants,animals and humans
  19. 34. is a bleaching agent in the manafactured of textile and paper
  20. 36. are element that have the properties intermediate between metals and non metals
  21. 39. it is a spherical cloud that becomes has dense
  22. 40. important in allowing us to digest our food properly
  23. 41. is a pure substance that is a combination of two or more elements
  24. 43. when it is negatively charged
  25. 44. is a gas,not a positive or negative ion
  26. 49. a fundamental part of the diet of humans
  27. 50. is any learning technique that aids information retention.
  28. 51. used to help physicians diagnose the disease or damage in the patients body
  29. 53. is a mixture of elements that has metallic properties