1025201
Descripción
Test por daveebinkley, actualizado hace más de 1 año
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Creado por daveebinkley
hace casi 10 años
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Pregunta 1
Pregunta
What is the difference between the isotopes Uranium-238 and Uranium-235?
Respuesta
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Uranium-238 has three more protons.
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Uranium-238 has three more neutrons.
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Uranium-238 has three more electrons.
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There is no difference.
Pregunta 2
Pregunta
An alpha particle is the same as a(n) ___.
Respuesta
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helium nucleus
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beta particle
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hydrogen nucleus
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electron
Pregunta 3
Pregunta
Nuclear fusion produces energy when ___.
Respuesta
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two atomic nuclei combine
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an atomic nucleus splits
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a chemical reaction occurs
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helium transmutes into hydrogen
Pregunta 4
Pregunta
Nuclear fission converts ___.
Respuesta
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small atoms into larger atoms
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small amounts of mass into energy
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small amounts of energy into mass
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small atoms into molecules
Pregunta 5
Pregunta
An unstable nucleus ____.
Respuesta
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increases its nuclear mass by fission
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expels all of its protons
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increases its half-life
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emits energy when it decays
Pregunta 6
Pregunta
The identity of an element, the atomic number, is determined by its number of _.
Respuesta
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Electrons
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Neutrons
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Protons
Pregunta 7
Pregunta
Which radiation has the poorest penetration (lowest ionization energy) but can cause the most damage to a cell?
Respuesta
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Alpha particles
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Beta particles
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Gamma rays
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They all have the same strength
Pregunta 8
Pregunta
What particle is needed to complete this nuclear reaction?
222 Rn → 218 Po + ____
86 84
Respuesta
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4 α 2
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0 ẞ -1
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0 γ 0
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1 n 0
Pregunta 9
Pregunta
When a uranium-235 nucleus is struck with a neutron, xenon-144 and strontium-90 nuclei are produced, along with some neutrons. How many neutrons are produced?
Respuesta
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0
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1
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2
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3
Pregunta 10
Pregunta
The iodine-131 nuclide has a half-life of 8.0 days. If you originally have a sample containing 728-g of I-131, after 48 days you will have ___.
Respuesta
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11.4 g
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22.75 g
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6.3 g
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45.5 g
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