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108 True/False questions

  1. fusionhave no measurable size or structure and do not seem to break down into smaller parts

          

  2. Gravitational force -short-ranged involved in beta decay.

          

  3. frequencyEnergy and momentum of light increases with an increase in

          

  4. Gamma DecayNo change in mass or atomic number of daughter nucleus

          

  5. nuclei elementsfound in nucleus, protons (positive) and neutrons (no charge)

          

  6. electronvolt (eV) - 1eVbinds neutrons and protons, strongest of fundamental forces, short ranged

          

  7. spectrumshelp stabilize the nucleus

          

  8. Parent nucleus- the new, stable nuclei

          

  9. electron's wavelengthE = nhf

          

  10. nis the quantum number (energy level, usually 1)

          

  11. BohrWHO proposed that the attractive force between the positive nucleus and negative electrons kept the electrons in orbit

          

  12. 1Beta decay: The atomic number (Z) of the daughter is___ less/___ more than that of the mother - the atomic mass (A) does not change

          

  13. Atomic number (Z) -number of protons

          

  14. Compton Shift -have no measurable size or structure and do not seem to break down into smaller parts

          

  15. momentum & energyThe electrons ejected have a _____that can be found by the following equation: KEe = hf - work function

          

  16. Antineutrinos_____ are also emitted in beta decay - needed to conserve momentum and energy in beta decay reactions - symbol, ν (nu)

          

  17. instantaneouslychanges the neutron/proton ratio in the parent nucleus - this affects the parent's nuclear stability

          

  18. activityWhen a pure gas fills a tube and a potential difference is applied across the tube, the gas will give off ___

          

  19. diffractAll matter should_____, although larger object's have such small wavelengths that there are no apertures through which they could pass

          

  20. blackbodyAn ideal system that absorbs all incoming radiation is called a

          

  21. Leptonshave no measurable size or structure and do not seem to break down into smaller parts

          

  22. Exponential relationshipFission usually occurs as a

          

  23. deBroglieWHO hypothesized that all matter also behaved like waves, this would mean that electrons should interfere and diffract

          

  24. strong forceholds nucleus together, overcomes the repulsion of the positive charges

          

  25. 4Alpha decay: Atomic mass (Z) decreases by ___ for the daughter

          

  26. metal's threshold frequencyElements with unstable nuclei will decay into two small _____

          

  27. Arthur ComptonEach photon affects one____

          

  28. absorbedWhen a light shines on the atom, only the photon whose energy matches the energy difference between the two levels is

          

  29. BohrWHO 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

          

  30. one & twoThe first orbit contains____ wavelength, the second orbit ___ wavelengths

          

  31. ejectedEach photon affects one____

          

  32. decayis the quantum number (energy level, usually 1)

          

  33. Emission spectrum -bright lines that correspond to the wavelength of light given off by a gas

          

  34. antineutrinosElectrons are accompanied by

          

  35. maximum kinetic energyThe electrons ejected have a _____that can be found by the following equation: KEe = hf - work function

          

  36. lighterWhen a pure gas fills a tube and a potential difference is applied across the tube, the gas will give off ___

          

  37. hardonshave no measurable size or structure and do not seem to break down into smaller parts

          

  38. Daughter nucleus- the new, stable nuclei

          

  39. The emitted photonshave no measurable size or structure and do not seem to break down into smaller parts

          

  40. half lifeAbsorbed photons account for the ___ in the absorption spectrum

          

  41. quantizedEinstein proposed that all electromagnetic waves are _____ - meaning they are bundles of energy (photons)

          

  42. atomic numbers (Z)Elements are identified by their

          

  43. Louis deBroglieUnstable daughters become parents for a new decay, leading to a ____

          

  44. 10^6"Mega" =

          

  45. fAlpha decay: Atomic Number (A) decrease by ___ for the daughter nucleus

          

  46. 2WHO proposed that the attractive force between the positive nucleus and negative electrons kept the electrons in orbit

          

  47. particle and a waveThe parent nucleus looses two protons and two neutrons

          

  48. mass deficitA stable nucleus's mass is less than the mass of its parts - called

          

  49. Nucleonsfound in nucleus, protons (positive) and neutrons (no charge)

          

  50. unique emission and absorption spectrumEach gas has a ____ & ____

          

  51. chain reactionFission usually occurs as a

          

  52. Critical mass -long-ranged, holds planets/stars in place, weakest of the forces

          

  53. Alpha DecayThe parent nucleus looses two protons and two neutrons

          

  54. binding energyA particle has a certain amount of energy due to its mass

          

  55. unit Becquerel (Bq) = 1 decay/secondAll objects emit

          

  56. dark linesAbsorbed photons account for the ___ in the absorption spectrum

          

  57. lightThe____ nuclei have more binding energy than the parent nucleus

          

  58. subatomic particleA stable nucleus's mass is less than the mass of its parts - called

          

  59. rest energyA particle has a certain amount of energy due to its mass

          

  60. neutrons....protonsExplained that black body radiation was due to submicroscopic electric oscillators called

          

  61. Blackbody radiation -emitted by blackbody, emits radiation only based on its temperature

          

  62. Absorption spectrum -binds neutrons and protons, strongest of fundamental forces, short ranged

          

  63. given positionFission usually occurs as a

          

  64. Heisenberg's Uncertainty PrincipleOne cannot know the position and momentum of a particle at the same time -

          

  65. Problems with Rutherford's ModelIf 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

          

  66. Beta decaychanges the neutron/proton ratio in the parent nucleus - this affects the parent's nuclear stability

          

  67. IsotopeWHO 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

          

  68. photoelectric effectDecay constant indicates the rate of ____

          

  69. Max PlanckDeveloped a formula that explained blackbody radiation

          

  70. FissionStrongly interacting particles - made up of mesons and baryons

          

  71. Electromagnetic force -All objects emit

          

  72. alpha, beta, and gammaThree types of radiation -

          

  73. resonatorsExplained that black body radiation was due to submicroscopic electric oscillators called

          

  74. neutrinoshave no measurable size or structure and do not seem to break down into smaller parts

          

  75. forcesame element (Z), but different mass because different N value

          

  76. The work function____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. mass number - atomic numbernumber of nucleons

          

  78. will notWhen a pure gas fills a tube and a potential difference is applied across the tube, the gas will give off ___

          

  79. neutrons_____ are also emitted in beta decay - needed to conserve momentum and energy in beta decay reactions - symbol, ν (nu)

          

  80. radioactive decayDecay constant indicates the rate of ____

          

  81. particles, lightLight is both a

          

  82. electromagnetic radiationcauses attraction/repulsion of charged particles, hold atoms/molecules together, long ranged

          

  83. chargestrong forces are Independent of___

          

  84. Strong force -binds neutrons and protons, strongest of fundamental forces, short ranged

          

  85. (u)Used for atomic mass

          

  86. Mass number (A) -number of protons

          

  87. short rangesstrong forces only appears at ____ (10-15m) - for longer distances it is practically nonexistent

          

  88. Erwin Schrödinger1924 - _____ proposed that all matter, not just light, behaved as both waves and particles

          

  89. Nuclear decay -the breaking apart of an unstable nucleus into two stable nuclei

          

  90. spontaneous emissionA stable nucleus's mass is less than the mass of its parts - called

          

  91. his planck's constant: 6.63x10-34 Js

          

  92. X-rays and gamma raysCompton shift is difficult o observe with visible light, easier to see in

          

  93. Planck's Equation:emitted by blackbody, emits radiation only based on its temperature

          

  94. unstable nucleiFor elements above Z (atomic number) = 83, adding neutrons is not enough to stabilize the nucleus - these elements have ____

          

  95. decay seriesWHO hypothesized that all matter also behaved like waves, this would mean that electrons should interfere and diffract

          

  96. energy (frequency)The amount of light shone on the metal doesn't matter, only the____ of the light matters

          

  97. temperatureWhat type of radiation a body will emit depends on its

          

  98. Neutrinoshelp stabilize the nucleus

          

  99. Weak Force -short-ranged involved in beta decay.

          

  100. Gamma DecayDeveloped a formula that explained blackbody radiation

          

  101. A curie - 1 Ci = 3.7 x 1010Bqnumber of protons

          

  102. ground stateAt ordinary temperatures, electrons remain in the

          

  103. higher energy EM wave emittedEinstein won the 1921 Noble Prize for this explanation of the

          

  104. activityWhen a pure gas fills a tube and a potential difference is applied across the tube, the gas will give off ___

          

  105. quantized energyPlanck assumed that these resonators could only absorb and give off certain amounts of energy - called

          

  106. DaughterThe____ nuclei have more binding energy than the parent nucleus

          

  107. Dual Nature of LightWHO hypothesized that all matter also behaved like waves, this would mean that electrons should interfere and diffract

          

  108. electronEach photon affects one____