Q. In nuclear fission, what is typically released along with energy?
A.
Neutrons
B.
Protons
C.
Electrons
D.
Photons
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Solution
In nuclear fission, when a heavy nucleus splits into smaller nuclei, it typically releases neutrons along with a significant amount of energy.
Correct Answer:
A
— Neutrons
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Q. What is the primary force that holds the protons and neutrons together in an atomic nucleus?
A.
Electromagnetic force
B.
Gravitational force
C.
Strong nuclear force
D.
Weak nuclear force
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Solution
The strong nuclear force is the primary force that holds protons and neutrons together in an atomic nucleus, overcoming the electromagnetic repulsion between protons.
Correct Answer:
C
— Strong nuclear force
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Q. What is the process called when an unstable nucleus emits radiation?
A.
Fission
B.
Fusion
C.
Radioactive decay
D.
Ionization
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Solution
Radioactive decay is the process by which an unstable nucleus emits radiation in the form of alpha, beta, or gamma rays.
Correct Answer:
C
— Radioactive decay
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Q. What is the term for the minimum amount of energy required to remove an electron from an atom?
A.
Ionization energy
B.
Binding energy
C.
Dissociation energy
D.
Activation energy
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Solution
Ionization energy is the minimum amount of energy required to remove an electron from an atom, leading to the formation of a positive ion.
Correct Answer:
A
— Ionization energy
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Q. What is the term for the minimum energy required to remove an electron from an atom?
A.
Ionization energy
B.
Binding energy
C.
Dissociation energy
D.
Activation energy
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Solution
Ionization energy is the minimum energy required to remove an electron from an atom, leading to the formation of a positively charged ion.
Correct Answer:
A
— Ionization energy
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Q. Which of the following is a characteristic of semiconductors?
A.
They conduct electricity at absolute zero
B.
They have a fixed number of free electrons
C.
Their conductivity increases with temperature
D.
They are always insulators
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Solution
Semiconductors have a conductivity that increases with temperature due to the increased number of charge carriers available for conduction.
Correct Answer:
C
— Their conductivity increases with temperature
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