Radioactivity

Mr. saunders (Australia)
75 words 54 learners

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Full list of words from this list:

words only definitions & notes
  1. radioactivity
    the discharge of particles or rays in nuclear decay
  2. nucleus
    the positively charged dense center of an atom
  3. proton
    a stable particle with positive charge
  4. neutron
    a subatomic particle with zero charge
  5. neutral
    having no net electric charge
  6. electron
    an elementary particle with negative charge
  7. charge
    the quantity of unbalanced electricity in a body
  8. atomic
    relating to the smallest component of an element
  9. element
    a substance that cannot be separated into simpler substances
  10. isotope
    atom with same atomic number, different number of neutrons
  11. periodic table
    arrangement of chemical elements according to atomic number
  12. density
    the amount per unit size
  13. stable
    maintaining equilibrium
  14. spontaneously
    in a spontaneous manner
  15. decay
    the spontaneous disintegration of a radioactive substance
  16. emit
    give off, send forth, or discharge
  17. transmutation
    the change of one chemical element into another
  18. radioisotope
    a radioactive isotope of an element
  19. radioactive
    exhibiting or caused by emissions in nuclear decay
  20. reactor
    apparatus to maintain and control a nuclear reaction
  21. bombard
    direct high energy particles or radiation against
  22. unstable
    subject to change; variable
  23. cancer
    a malignant growth caused by uncontrolled cell division
  24. electromagnetic
    pertaining to or exhibiting magnetism produced by electric charge in motion
  25. alpha decay
    radioactive decay of an atomic nucleus that is accompanied by the emission of an alpha particle
  26. beta decay
    radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle
  27. gamma radiation
    electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
  28. parent
    a father or mother
  29. daughter
    a female human offspring
  30. symbol
    an arbitrary sign with a conventional significance
  31. smoke alarm
    an alarm that is tripped off by fire or smoke
  32. detector
    equipment that picks up radio signals or radioactivity
  33. physical
    concerned with material things
  34. stable
    resistant to change of position or condition
  35. spontaneously
    in a spontaneous manner
  36. artificial
    not arising from natural growth
  37. mode
    how something is done or how it happens
  38. exposure
    the state of being exposed to harm
  39. eventually
    after an unspecified period of time or a long delay
  40. antineutrino
    the antiparticle of a neutrino
  41. frequency
    the number of occurrences within a given time period
  42. radiation
    energy transmitted in the form of rays or waves or particles
  43. emission
    a substance that is released
  44. Geiger counter
    counter tube that detects ionizing radiations
  45. Geiger-Muller tube
    an ionization chamber contained in a tube in a Geiger counter
  46. electrode
    a conductor used to make electrical contact with some part of a circuit
  47. ion
    a particle that is electrically charged positive or negative
  48. exposure
    the act of allowing light to reach film in a camera
  49. penetrate
    pass into or through, often by overcoming resistance
  50. absorb
    cause to become one with
  51. lead
    a soft heavy toxic malleable metallic element
  52. aluminium
    a silvery, flexible, metallic element
  53. concrete
    a strong hard building material made with gravel and cement
  54. paper
    a medium for written communication
  55. dislodge
    remove or force out from a position
  56. sample
    take a small part of something
  57. geologist
    a specialist in the history of the Earth recorded in rocks
  58. synchrotron
    cyclotron in which the electric field is maintained at a constant frequency
  59. annual
    completing its life cycle within a year
  60. daily
    of or belonging to or occurring every day
  61. beam
    a group of parallel lines of electromagnetic radiation
  62. hospital
    a medical institution where sick or injured people are given medical or surgical care
  63. astronaut
    a person trained to travel in a spacecraft
  64. ionise
    become converted into ions
  65. half life
    the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
  66. probability
    a measure of how likely it is that some event will occur
  67. background
    signals extraneous to a phenomenon to be observed
  68. genetic
    of a segment of DNA involved in producing polypeptide chains
  69. equivalent
    being essentially comparable to something
  70. irradiate
    expose to radiation
  71. mutation
    any event that changes genetic structure
  72. radiotherapy
    (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
  73. x-ray
    take a photograph with a stream of high-energy photons
  74. tumour
    an abnormal new mass of tissue that serves no purpose
  75. particle
    a body having finite mass but negligible dimensions
Created on Sun Apr 21 04:24:33 EDT 2013 (updated Mon Feb 24 18:16:28 EST 2014)

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