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105 Matching questions

  1. frequency
  2. unique emission and absorption spectrum
  3. short ranges
  4. Daughter
  5. hardons
  6. atomic numbers (Z)
  7. Dual Nature of Light
  8. Exponential relationship
  9. Atomic number (Z) -
  10. Heisenberg's Uncertainty Principle
  11. Planck's Equation:
  12. dark lines
  13. activity
  14. one & two
  15. electronvolt (eV) - 1eV
  16. neutrinos
  17. subatomic particle
  18. The work function
  19. absorbed
  20. electron
  21. alpha, beta, and gamma
  22. unit Becquerel (Bq) = 1 decay/second
  23. ejected
  24. decay series
  25. Louis deBroglie
  26. spectrums
  27. Bohr
  28. diffract
  29. Neutrinos
  30. mass deficit
  31. h
  32. Nuclear decay -
  33. binding energy
  34. Problems with Rutherford's Model
  35. photoelectric effect
  36. electromagnetic radiation
  37. unstable nuclei
  38. 10^6
  39. Blackbody radiation -
  40. rest energy
  41. fusion
  42. X-rays and gamma rays
  43. Beta decay
  44. Mass number (A) -
  45. decay
  46. spontaneous emission
  47. quantized energy
  48. nuclei elements
  49. resonators
  50. Max Planck
  51. antineutrinos
  52. light
  53. f
  54. Emission spectrum -
  55. particles, light
  56. momentum & energy
  57. Leptons
  58. metal's threshold frequency
  59. Arthur Compton
  60. Critical mass -
  61. electron's wavelength
  62. Gamma Decay
  63. maximum kinetic energy
  64. Nucleons
  65. neutrons....protons
  66. instantaneously
  67. temperature
  68. (u)
  69. energy (frequency)
  70. quantized
  71. particle and a wave
  72. strong force
  73. half life
  74. 4
  75. Alpha Decay
  76. The emitted photons
  77. Isotope
  78. given position
  79. higher energy EM wave emitted
  80. Compton Shift -
  81. neutrons
  82. ground state
  83. Weak Force -
  84. Gravitational force -
  85. Parent nucleus
  86. Erwin Schrödinger
  87. Fission
  88. radioactive decay
  89. Daughter nucleus
  90. lighter
  91. Electromagnetic force -
  92. 1
  93. will not
  94. 2
  95. mass number - atomic number
  96. n
  97. chain reaction
  98. blackbody
  99. force
  100. Strong force -
  101. A curie - 1 Ci = 3.7 x 1010Bq
  102. charge
  103. deBroglie
  104. Antineutrinos
  105. Absorption spectrum -
  1. a strong forces only appears at ____ (10-15m) - for longer distances it is practically nonexistent
  2. b The electrons ejected have a _____that can be found by the following equation: KEe = hf - work function
  3. c What type of radiation a body will emit depends on its
  4. d One cannot know the position and momentum of a particle at the same time -
  5. e unit for activity
  6. f Heavier nuclei need more ____ than ___- for stability
  7. g The quantity ψ2 is proportional to the probability of finding an electron at a
  8. h Higher temperature =
  9. i Radiation is emitted with the two nuclei - as____,____ or both
  10. j A particle has a certain amount of energy due to its mass
  11. k In order to eject electrons, the electron must overcome the_____ holding it to the atom
  12. l ____ realized that if light behaved like a particle, then a collision between an electron and a photon should be similar to two balls colliding
  13. m have no measurable size or structure and do not seem to break down into smaller parts
  14. n The circumference of the orbit must equal an integral number of the
  15. o Strong force exists between all ____, not just protons
  16. p WHO Stated that the electrons were only allowed to be in certain orbits - electrons could jump from one orbit to the next, but could never be in between the circular orbits
  17. q = -∆N/∆t
  18. r number of nucleons
  19. s Alpha decay: Atomic Number (A) decrease by ___ for the daughter nucleus
  20. t Developed a formula that explained blackbody radiation
  21. u number of protons
  22. v Energy and momentum of light increases with an increase in
  23. w Planck assumed that these resonators could only absorb and give off certain amounts of energy - called
  24. x Beta decay: The atomic number (Z) of the daughter is___ less/___ more than that of the mother - the atomic mass (A) does not change
  25. y the breaking apart of an unstable nucleus into two stable nuclei
  26. z Einstein won the 1921 Noble Prize for this explanation of the
  27. aa This difference in mass is attributed to the energy needed to hold the nucleus together - called
  28. ab All matter should_____, although larger object's have such small wavelengths that there are no apertures through which they could pass
  29. ac - the new, stable nuclei
  30. ad Each photon affects one____
  31. ae changes the neutron/proton ratio in the parent nucleus - this affects the parent's nuclear stability
  32. af The photoelectric effect will not be observed if the frequency of light shone on a metal is not at least at that ____
  33. ag For elements above Z (atomic number) = 83, adding neutrons is not enough to stabilize the nucleus - these elements have ____
  34. ah Once an electron is in an excited state, there is a certain probability that it was "fall" back down to the ground state by emitting a photon - called
  35. ai The____ nuclei have more binding energy than the parent nucleus
  36. aj Electrons are accompanied by
  37. ak holds nucleus together, overcomes the repulsion of the positive charges
  38. al Light is both a
  39. am Einstein proposed that all electromagnetic waves are _____ - meaning they are bundles of energy (photons)
  40. an Three types of radiation -
  41. ao If electrons orbit the nucleus, then why don't they undergo centripetal acceleration
    ; Orbiting electrons should produce magnetic fields according to Maxwell's Equations - this would cause them to loose energy
    ; A lost in energy would cause the electron orbit to decrease - the atom would collapse
  42. ap bright lines that correspond to the wavelength of light given off by a gas
  43. aq All objects emit
  44. ar is the quantum number (energy level, usually 1)
  45. as increase in wavelength of light as it strikes an electron
  46. at Photons should carry ____ as well as ____
  47. au - starting nucleus
  48. av binds neutrons and protons, strongest of fundamental forces, short ranged
  49. aw An ideal system that absorbs all incoming radiation is called a
  50. ax 1924 - _____ proposed that all matter, not just light, behaved as both waves and particles
  51. ay Decay constant indicates the rate of ____
  52. az WHO proposed that a particle can be represented by a value, ψ, called the wave function
  53. ba long-ranged, holds planets/stars in place, weakest of the forces
  54. bb Amount of time it takes for half a sample to decay
  55. bc - Large nucleus splits into two smaller nuclei, this releases energy
  56. bd strong forces are Independent of___
  57. be white light is shone on the gas, the spectrum is a band of dark lines indicating what wavelengths of light were absorbed by the gas
  58. bf emitted by blackbody, emits radiation only based on its temperature
  59. bg Compton shift is difficult o observe with visible light, easier to see in
  60. bh Elements with unstable nuclei will decay into two small _____
  61. bi Explained that black body radiation was due to submicroscopic electric oscillators called
  62. bj found in nucleus, protons (positive) and neutrons (no charge)
  63. bk WHO hypothesized that all matter also behaved like waves, this would mean that electrons should interfere and diffract
  64. bl Elements are identified by their
  65. bm The first orbit contains____ wavelength, the second orbit ___ wavelengths
  66. bn "Mega" =
  67. bo Each gas has a ____ & ____
  68. bp A more intense light source ___ generate higher KE electrons
  69. bq The amount of light shone on the metal doesn't matter, only the____ of the light matters
  70. br minimum amount of nuclides needed to sustain a chain reaction
  71. bs When a pure gas fills a tube and a potential difference is applied across the tube, the gas will give off ___
  72. bt unites two smaller nuclei to make a larger nucleus - generates energy
  73. bu _____ are also emitted in beta decay - needed to conserve momentum and energy in beta decay reactions - symbol, ν (nu)
  74. bv Alpha decay: Atomic mass (Z) decreases by ___ for the daughter
  75. bw Unstable daughters become parents for a new decay, leading to a ____
  76. bx ____is the minimum amount of energy required to help the electron escape from the atoms of the metal (E = hfo) where fo is the threshold frequency for the metal
  77. by At ordinary temperatures, electrons remain in the
  78. bz help stabilize the nucleus
  79. ca E = nhf
  80. cb is planck's constant: 6.63x10-34 Js
  81. cc Another energy unit used in quantum mechanics is the ____ = 1.60x10-19J
  82. cd Absorbed photons account for the ___ in the absorption spectrum
  83. ce another unit for activity
  84. cf If the daughter nucleus is stable (mass = periodic table mass) the___ stops
  85. cg - amount remaining over a certain time period
  86. ch All gasses have unique____ - used to determine elements in a mixture
  87. ci The greater the frequency of light, the greater the KE of the electrons____
  88. cj Emission of high energy photons
  89. ck Neutron number (N) - number of neutrons ____-_____
  90. cl same element (Z), but different mass because different N value
  91. cm The electrons are ejected almost___
  92. cn is the frequency of the light wave
  93. co The parent nucleus looses two protons and two neutrons
  94. cp Theory is that all EM waves consist of photons that have no mass, but carry energy and have momentum
  95. cq When a light shines on the atom, only the photon whose energy matches the energy difference between the two levels is
  96. cr Used for atomic mass
  97. cs Positrons are accompanied by
  98. ct Strongly interacting particles - made up of mesons and baryons
  99. cu ____nuclei are more tightly bound and have less mass than parent nucleus
  100. cv short-ranged involved in beta decay.
  101. cw Fission usually occurs as a
  102. cx causes attraction/repulsion of charged particles, hold atoms/molecules together, long ranged
  103. cy A stable nucleus's mass is less than the mass of its parts - called
  104. cz antiparticle of neutrinos, symbol, ṽ
  105. da cause the bright lines on an emission spectrum