CROSSWORD PUZZLE

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