A) a neutron is transformed to a proton. B) a proton is transformed to a neutron. C) a neutron is ejected from the nucleus. D) a proton is ejected from the nucleus. E) the number of nucleons decreases. A) a neutron is transformed to a proton. B) a proton is transformed to a neutron. C) a neutron is ejected from the nucleus. D) a proton is ejected from the nucleus. E) the number of nucleons decreases.

Exam 30: Nuclear Physics

The neutral helium atom, $^{4}_{2}$ He, has a mass of 4.002603 u, a neutron has a mass of 1.008665 u, a proton has a mass of 1.007277 u, and a neutral hydrogen atom has a mass of 1.007825 u. What is the binding energy of the $^{4}_{2}$ He nucleus? (1 u = 931.5 MeV/c²)

(Multiple Choice)

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Question 101

Carbon-14 decays by β^- emission. What nucleus is left after this decay?

(Multiple Choice)

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Question 102

A 1.0-mol sample of an isotope is decaying with a half-life of 28 y. After 61 y, how many moles of this isotope are left and what is its activity in Bq?

(Short Answer)

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Question 103

Which of the following particles are leptons? (There may be more than one correct choice.)

(Multiple Choice)

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Question 104

Atomic nuclei that are all isotopes of an element all have the same

(Multiple Choice)

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Question 105

In the first nuclear reaction observed, physicists saw an alpha particle (Z = 2) interact with a nitrogen nucleus in air (Z = 7) to produce a proton. The energy of the alpha particle was $55 \mathrm { MeV } \text {, }$ enough to enable the nuclei to touch in spite of the Coulomb repulsion. What distance (in fm) between the centers of the alpha particle and the nitrogen was reached? This determines a limit on the radius of the nitrogen nucleus. (1 eV = 1.60 × 10^-19 J, e = 1.60 × 10^-19 C, 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

(Multiple Choice)

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Question 106

The neutron is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?

(Multiple Choice)

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Question 107

During β⁺ decay

(Multiple Choice)

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Question 108

Radium-226 decays into radon-222 plus an alpha particle. The relevant masses are $^{4}_{2}$ He: 4.002603 u $^{222}_{86}$ Rn: 222.017570 u $^{226}_{88}$ Ra: 226.025402 u How much energy is released in this process? (1 u = 931.5 MeV/c²)

(Multiple Choice)

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Question 109

An yttrium isotope has 39 protons and 50 neutrons in its nucleus. Which one of the following symbols accurately represents this isotope?

(Multiple Choice)

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Question 110

When an unstable nucleus decays by emitting an alpha particle, the atomic mass number A of the nucleus

(Multiple Choice)

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Question 111

Elementary particles that experience the weak nuclear force but not the strong nuclear force are called

(Multiple Choice)

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Question 112

A radioactive substance with a half-life of 3.0 days has an initial activity of 2400 Bq. What is its activity after 6.0 days?

(Multiple Choice)

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Question 113

The symbol for a certain isotope of polonium is $^{214}_{84}$ Po. How many neutrons are there in the nucleus of this isotope?

(Multiple Choice)

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Question 114

A gamma ray is also known as

(Multiple Choice)

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Question 115

In the nuclear reaction $^{3}_{1} H + ^{3}_{1} H → X + ^{4}_{2} He$ , what is X?

(Multiple Choice)

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Question 116

The diameter of an atom is 1.4 × 10^-10 m and the diameter of its nucleus is 1.0 × 10^-14 m. What fraction of the atom's volume is occupied by its nucleus?

(Multiple Choice)

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Question 117

How much energy is released when 0.60 μg of ³H have decayed to ³He? The mass of ³He is 3.0160293 u, the mass of ³H is 3.0160492 u, 1 u = 931.5 MeV/c², 1 eV = 1.60 × 10^-19 J, and N_A = 6.022 × 10²³ molecules/mol.

(Short Answer)

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Question 118

A 70-kg researcher absorbs 4.5 × $10^8$ neutrons in a work day, each of energy 1.2 MeV. The relative biological effectiveness (RBE) for these neutrons is 10. What is the equivalent dosage of the radiation exposure for this researcher, in millirem?

(Multiple Choice)

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Question 119

When a β^- particle is emitted from an unstable nucleus, the atomic number of the nucleus

(Multiple Choice)

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Question 120

Showing 101 - 120 of 175

Exam 30: Nuclear Physics

The neutral helium atom, 24^{4}_{2}24​ He, has a mass of 4.002603 u, a neutron has a mass of 1.008665 u, a proton has a mass of 1.007277 u, and a neutral hydrogen atom has a mass of 1.007825 u. What is the binding energy of the 24^{4}_{2}24​ He nucleus? (1 u = 931.5 MeV/c2)

Carbon-14 decays by β- emission. What nucleus is left after this decay?

A 1.0-mol sample of an isotope is decaying with a half-life of 28 y. After 61 y, how many moles of this isotope are left and what is its activity in Bq?

Which of the following particles are leptons? (There may be more than one correct choice.)

Atomic nuclei that are all isotopes of an element all have the same

The neutron is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?

During β+ decay

Radium-226 decays into radon-222 plus an alpha particle. The relevant masses are 24^{4}_{2}24​ He: 4.002603 u 86222^{222}_{86}86222​ Rn: 222.017570 u 88226^{226}_{88}88226​ Ra: 226.025402 u How much energy is released in this process? (1 u = 931.5 MeV/c2)

An yttrium isotope has 39 protons and 50 neutrons in its nucleus. Which one of the following symbols accurately represents this isotope?

When an unstable nucleus decays by emitting an alpha particle, the atomic mass number A of the nucleus

Elementary particles that experience the weak nuclear force but not the strong nuclear force are called

A radioactive substance with a half-life of 3.0 days has an initial activity of 2400 Bq. What is its activity after 6.0 days?

The symbol for a certain isotope of polonium is 84214^{214}_{84}84214​ Po. How many neutrons are there in the nucleus of this isotope?

A gamma ray is also known as

In the nuclear reaction 13H+13H→X+24He^{3}_{1} H + ^{3}_{1} H → X + ^{4}_{2} He13​H+13​H→X+24​He , what is X?

The diameter of an atom is 1.4 × 10-10 m and the diameter of its nucleus is 1.0 × 10-14 m. What fraction of the atom's volume is occupied by its nucleus?

How much energy is released when 0.60 μg of 3H have decayed to 3He? The mass of 3He is 3.0160293 u, the mass of 3H is 3.0160492 u, 1 u = 931.5 MeV/c2, 1 eV = 1.60 × 10-19 J, and NA = 6.022 × 1023 molecules/mol.

A 70-kg researcher absorbs 4.5 × 10810^8108 neutrons in a work day, each of energy 1.2 MeV. The relative biological effectiveness (RBE) for these neutrons is 10. What is the equivalent dosage of the radiation exposure for this researcher, in millirem?

When a β- particle is emitted from an unstable nucleus, the atomic number of the nucleus

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The neutral helium atom, $^{4}_{2}$ He, has a mass of 4.002603 u, a neutron has a mass of 1.008665 u, a proton has a mass of 1.007277 u, and a neutral hydrogen atom has a mass of 1.007825 u. What is the binding energy of the $^{4}_{2}$ He nucleus? (1 u = 931.5 MeV/c²)

Carbon-14 decays by β^- emission. What nucleus is left after this decay?

During β⁺ decay

Radium-226 decays into radon-222 plus an alpha particle. The relevant masses are $^{4}_{2}$ He: 4.002603 u $^{222}_{86}$ Rn: 222.017570 u $^{226}_{88}$ Ra: 226.025402 u How much energy is released in this process? (1 u = 931.5 MeV/c²)

The symbol for a certain isotope of polonium is $^{214}_{84}$ Po. How many neutrons are there in the nucleus of this isotope?

In the nuclear reaction $^{3}_{1} H + ^{3}_{1} H → X + ^{4}_{2} He$ , what is X?

The diameter of an atom is 1.4 × 10^-10 m and the diameter of its nucleus is 1.0 × 10^-14 m. What fraction of the atom's volume is occupied by its nucleus?

How much energy is released when 0.60 μg of ³H have decayed to ³He? The mass of ³He is 3.0160293 u, the mass of ³H is 3.0160492 u, 1 u = 931.5 MeV/c², 1 eV = 1.60 × 10^-19 J, and N_A = 6.022 × 10²³ molecules/mol.

A 70-kg researcher absorbs 4.5 × $10^8$ neutrons in a work day, each of energy 1.2 MeV. The relative biological effectiveness (RBE) for these neutrons is 10. What is the equivalent dosage of the radiation exposure for this researcher, in millirem?

When a β^- particle is emitted from an unstable nucleus, the atomic number of the nucleus