1. Unit 6 Review
Atomic Structure

2. For 238U, the 238 is the Atomic Mass Mass Number Atomic Number
Number of Protons
Number of Neutrons
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3. Which of the following number of neutrons would result in the most stable nucleus of sodium?
Four
Twelve
Eighteen
Twenty-three
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4. How many electrons does Sr+2 have??36 38 40 88
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5. Which isotope of Barium will most likely be stable?
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6. Which of the following shows the radiation in order of increasing harmfulness?
Gamma, Beta, Alpha
Beta, Alpha, Gamma
Alpha, Beta, Gamma
Beta, Gamma, Alpha
Alpha, Gamma, Beta
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7. Which element has the configuration [Kr]5s14d10 ?Pd Ag Cd Sr Cu Zn
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8. What does an alpha particle consist of?
1 proton
2 protons
2 neutrons
2 protons and 2 neutrons
4 protons
4 neutrons
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9. Which of the following would be a product of the beta decay of Ra-227?
Rn-223
Ac-227
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10. Which of the following causes light to be given off in neon lights?
The gas is burned, giving off light
The electrons absorb energy and jump up
Electrons jump from the excited to ground state
A tiny wire in the tube glows when hot
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11. Level 5 to 2 Level 4 to 2 Level 3 to 2 Level 5 to 3 Level 4 to 3
Using your hydrogen spectrum sheet on page 19, which electron jump produces an energy with a wavelength 4800 Angstroms ?
Level 5 to 2
Level 4 to 2
Level 3 to 2
Level 5 to 3
Level 4 to 3
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12. Which represents the quantum numbers for the last electron in Se?
4, p, z, +1
4, p, y, +1
4, p, x, +1
4, p, x, -1
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13. Which of the following is an example of nuclear fission?
238U  234Th + 4He
236U  90Sr + 143Xe + 3 1n
1H +3H  4He
210Po  210At + 0e-
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14. 7 minutes 8 minutes 15 minutes 20 minutes 23 minutes
If Radium-245 has a half life of 5 minutes, how long will it take a 36g sample to only have 4.5 grams remain?
7 minutes
8 minutes
15 minutes
20 minutes
23 minutes
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15. Principal Quantum Number Spin Quantum Number
Which of the following describes the type of orbital an electron is in?
Principal Quantum Number
Spin Quantum Number
Angular Momentum Quantum Number
Magnetic Quantum Number
Bohr Quantum Number
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16. Which statement below correctly describes the behavior of subatomic particles in a magnetic field ?
Alpha and Beta are both deflected in the same direction while gamma shows no response
Gamma and Alpha are both deflected in opposite directions while beta shows no response
Alpha and Beta are both deflected in opposite directions, while gamma shows no response
Only alpha is deflected. Beta and Gamma show no response.
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17. What is the wavelength in meters of energy with a wavelength of 32,400Å? (1 Angstrom = 1 x meters.)
3.24 x 10-5 m
3.24 x 10-6 m
3.40 x m
3.40 x m
3.09 x 1013 m
3.09 x 1014 m
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18. Which pair of atoms are isotopes of the same element?
and
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19. Which of the following is not true about nuclear power plants?
They use nuclear fission reactions
They use steam to turn generators
They have radioactive byproducts
They are major contributors to acid rain
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20. Which of the following best explains where the energy comes from in nuclear power?
Pulling apart the nucleus gives energy
Mass is lost and converted into energy
Radioactive particles release energy
Electrons jump down energy levels
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