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62 Cards in this Set
- Front
- Back
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6 methods of decay
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alpha
beta positron Isomeric transition Electron capture fission |
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Alpha has too many ? p, n, e
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Protons
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Alpha is seen with Z# greater than? A greater than?
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Z-82
A-150 |
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What molecule is lost with alpha decay?
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4/2He
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Which particle is least penetrating and slowest moving?
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Alpha
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235/92 U->231/90 Th+ 4/2 He is an example of what kind of decay?
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Alpha
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131/53I-> 131/54Xe + 0/0B + antineutrino is an example of what?
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Beta
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Beta has too many? p, n, e
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Neutrons
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In Beta what happens to the A#? The Z#?
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A=same
Z=+1 |
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Name 2 forms of particulate radiation? Non particulate radiation?
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Particulate-Beta, Positron, Alpha
Non-particulate- Gamma & X-ray |
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Nucleus contains? p, n, e
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Protons and Neutrons
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What is the A#
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Atomic number, number of protons+neutrons
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Positron emmision is ___ rich? p, n, e
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Proton
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Energy greater than? is found in positron decay?
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1.02 MeV
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What is it called when energy is converted to mass?
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Pair production
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What happens to the A# and the Z# with Positron decay?
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A-same
Z-1 |
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23/12 Mg -> 23/11Na + 0/1e + neutrino is an example of what kind of decay?
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Positron
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If energy is less than 1.02Mev and an atom is proton rich what kind of decay will be found?
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Electron capture
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What kind of radiation is released in electron capture?
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characteristic radiation
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What amount of energy is released with Positron decay?
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2- 511KeV photns
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How many degrees apart are positron photons seen?
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180 degrees
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What kind of radiation is released in isomeric transition?
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gamma rays only
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Name 3 states of isomeric transition?
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ground, isomeric state, metastable
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An electron+ is ejected from the nucleus and it knocks an electron- out of an orbital shell. What kind of electron is the 2nd ejected electron?
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Auger
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What is internal conversion?
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Energy is tranferred to an orbital electron
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What 3 things are found after a fission reaction?
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2FF + 2-3n +200-400MeV of energy
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In fission what must the A# and Z# be greater than?
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A-82
Z-200 |
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What 3 things are shown in a decay scheme?
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Mode of decay
Byproduct of decay Half-life of RN |
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How will an arrow point in a decay scheme if you gain a proton(B-)?
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To the left
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If an arrow in decay scheme points to the right what kind of decay is shown? What happens to Z#?
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positron or electron capture .
Z# is reduced |
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Formula for average T1/2
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Tav=1.44 X T1/2
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Decay constant formula?
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.693/T1/2
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Effective half life formula?
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Te=TbxTp / Tb+ Tp
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1Bq=? dps
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1dps
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1mCi= ?dps
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3.7 x10^7dps
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Same A#
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isobars
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Same #protons
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Isotopes
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Same number of neutrons
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isotones
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Wavelength energy formula?
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E=124/lambda
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Mass of protons
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1.67 x 10^-27kg
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Mass of neutrons
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1.67 x10^-27kg
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Mass of electrons
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9.1 x10^-31kg
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Charge of protons
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+1.6 x10^-19 coloumbs
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Charge of neutrons
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None
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Charge of electrons
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-1.6 x 10^-19 coloumbs
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How many electrons are in the K shell?
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2
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How many electrons are in the L shell?
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8
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How many electrons are in the M shell?
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18
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How many electrons are in the N shell?
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32
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1 fermi is ___m
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10^-15m
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An electron cloud is ___ Angstroms wide
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1-3
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1 Angstrom is how many cm?
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10^-8cm
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Radius of a nucleus is?
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1-7 fermis
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Which is bigger Ci or Bq?
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Curie
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Same A & Z#'s but differents energy levels is called an ?
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Isomer
(think Isomeric Transition) |
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Radionuclides are? stable or ustable
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unstable
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Ci and Bq measure
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activity
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Rad and Gray measure
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absorbed dose
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REM and Sv measure
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biologic damage due to varying energies of radiation that is absorbed
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1Ci= __Bq
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3.7 x 10^10Bq
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1 Gy=__Rads
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100 Rads
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1 Sv=__ REM
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100 REM
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