Question 1

The primary reason that very large nuclei are unstable is due to

Accepted Answer

A) the cumulative repulsive force of the protons. 
B) the cumulative attractive force between the protons and the orbiting electrons. 
C) the repulsive force between the neutrons and the protons. 
D) the extreme weakness of the gravitational attraction of the protons. 
A) the cumulative repulsive force of the protons. 
B) the cumulative attractive force between the protons and the orbiting electrons. 
C) the repulsive force between the neutrons and the protons. 
D) the extreme weakness of the gravitational attraction of the protons.

Question 2

Consider the nuclear reaction ${}^{3}_{1}$ H + ${}^{3}_{1}$ H → ${}^{4}_{2}$ He + 2 ${}^{1}_{0}$ n.The known atomic masses are ${}^{4}_{2}$ He: 4.002603 u ${}^{3}_{1}$ H: 3.016049u ${}^{1}_{0}$ n: 1.008665 u What is the energy released (positive)or absorbed (negative)in this nuclear reaction? (1 u = 931.5 MeV/c2)

Accepted Answer

A) 0.0122 MeV 
B) -0.0122 MeV 
C) 11.3 MeV 
D) -11.3 MeV 
A) 0.0122 MeV 
B) -0.0122 MeV 
C) 11.3 MeV 
D) -11.3 MeV

Question 3

How many protons,neutrons,and nucleons are there in a carbon-14 nucleus?

Accepted Answer

6 protons,

Question 4

What is the mass number of alpha particles?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 6 
A) 1 
B) 2 
C) 3 
D) 4 
E) 6

Question 5

During β+ decay

Accepted Answer

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.

Question 6

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)

Accepted Answer

A) 20.5 MeV 
B) 22.4 MeV 
C) 27.3 MeV 
D) 28.3 MeV 
E) 23.4 MeV 
A) 20.5 MeV 
B) 22.4 MeV 
C) 27.3 MeV 
D) 28.3 MeV 
E) 23.4 MeV

Question 7

Determine the missing product X in the following nuclear reaction: $^{13} _{7} N$ + neutron → X + alpha particle

Accepted Answer

None

Question 8

Polonium-215, $^{215}
_{84} Po$,undergoes alpha decay with a half-life of 1.8 ms.
(a)What percent of the original polonium-215 is left after 0.010 s?
(b)How many protons and neutrons does the daughter nucleus contain?

Accepted Answer

(a)2.1%<sup> </sup> 
(

Question 9

In beta-minus decay

Accepted Answer

A) a proton is emitted. 
B) a neutron is emitted. 
C) an electron is emitted. 
D) an electron decays into another particle. 
E) a proton is transformed into a neutron. 
A) a proton is emitted. 
B) a neutron is emitted. 
C) an electron is emitted. 
D) an electron decays into another particle. 
E) a proton is transformed into a neutron.

Question 10

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

Accepted Answer

A) number of nucleons. 
B) mass. 
C) number of protons. 
D) number of neutrons. 
A) number of nucleons. 
B) mass. 
C) number of protons. 
D) number of neutrons.

Question 11

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

Accepted Answer

A) increases by 4. 
B) increases by 2. 
C) decreases by 2. 
D) decreases by 4. 
E) remains unchanged. 
A) increases by 4. 
B) increases by 2. 
C) decreases by 2. 
D) decreases by 4. 
E) remains unchanged.

Question 12

The atomic mass unit is defined as

Accepted Answer

A) the mass of a proton. 
B) the mass of an electron. 
C) the mass of a hydrogen-1 atom. 
D) one twelfth the mass of a carbon-12 atom. 
E) the mass of a carbon-12 nucleus. 
A) the mass of a proton. 
B) the mass of an electron. 
C) the mass of a hydrogen-1 atom. 
D) one twelfth the mass of a carbon-12 atom. 
E) the mass of a carbon-12 nucleus.

Question 13

The stability of ${}^{11}_{6}$ C with respect to alpha,beta-plus and beta-minus decay is to be determined.The following atomic masses are known: ${}^{4}_{2}$ He: 4.002603 u $\begin{array} { c } 
7 \
4
\end{array}$ Be: 7.016928 u $\begin{array} { c } 
11 \
5
\end{array}$ B: 11.009305 u ${}^{11}_{6}$ C: 11.011433 u ${}^{11}_{7}$ N: 11.026742 u The ${}^{11}_{6}$ C nucleus is

Accepted Answer

A) not subject to alpha, beta-plus or beta-minus decay. 
B) subject to alpha decay only. 
C) subject to beta-plus decay only. 
D) subject to beta-minus decay only. 
E) subject to beta-plus or beta-minus decay, but not to alpha decay. 
A) not subject to alpha, beta-plus or beta-minus decay. 
B) subject to alpha decay only. 
C) subject to beta-plus decay only. 
D) subject to beta-minus decay only. 
E) subject to beta-plus or beta-minus decay, but not to alpha decay.

Question 14

Neodymium $^{144}
_{60} Nd$ is an isotope that undergoes alpha decay.What isotope is the product of this decay?

Accepted Answer

A)  $^{142} 
_{56}
Ba$ 
B)  $^{140}
_{58} Ce$ 
C)  $1^{40}
_{59} Pr$ 
D)  $^{142}
_{62} Sm$ 
E)  $^{146}
_{64} Gd$ 
A)  $^{142} 
_{56}
Ba$ 
B)  $^{140}
_{58} Ce$ 
C)  $1^{40}
_{59} Pr$ 
D)  $^{142}
_{62} Sm$ 
E)  $^{146}
_{64} Gd$

Question 15

An excited $^{236} 
_{92}$ U∗ nucleus undergoes fission into two fragments as follows: $^{236} 
_{92}$ U∗ → $\begin{array} { c } 
144 \
56
\end{array}$ Ba + ${}^{92}_{36}$ Kr The following atomic masses are known: ${}^{92}_{36}$ Kr: 91.926270 u $\begin{array} { c } 
144 \
56
\end{array}$ Ba: 143.922845 u $^{236} 
_{92}$ U∗: 236.045563 u
What is the reaction energy released during this fission reaction? (1 u = 931.5 MeV/c2)

Accepted Answer

A) 150 MeV 
B) 160 MeV 
C) 170 MeV 
D) 180 MeV 
E) 190 MeV 
A) 150 MeV 
B) 160 MeV 
C) 170 MeV 
D) 180 MeV 
E) 190 MeV

Question 16

Two deuterium nuclei, ${}^{2}_{1}$ H,fuse to produce a tritium nucleus, ${}^{3}_{1}$ H,plus an ordinary hydrogen nucleus, ${}^{1}_{1}$ H.A neutral deuterium atom has a mass of 2.014102 u; a neutral tritium atom has a mass of 3.016050 u; a neutral hydrogen atom has a mass of 1.007825 u; a neutron has a mass of 1.008665 u; and a proton has a mass of 1.007277 u.How much energy is released in this fusion process? (1 u = 931.5 MeV/c2)

Accepted Answer

A) 3.03 MeV 
B) 3.53 MeV 
C) 4.03 MeV 
D) 4.53 MeV 
E) 6.58 MeV 
A) 3.03 MeV 
B) 3.53 MeV 
C) 4.03 MeV 
D) 4.53 MeV 
E) 6.58 MeV

Question 17

Determine the missing product X in the following nuclear reaction: $\begin{array} { c } 
10 \
5
\end{array}$ B + neutron → X + alpha particle

Accepted Answer

The answer of Determine the missing product X in the...

Question 18

A hypothetical particle has a mass of 510 MeV/c2.If such a particle at rest decays into two gamma-ray photons,what is the wavelength of each photon? (1 eV = 1.60 × 10-19 J,c = 3.00 × 108 m/s,h = 6.626 × 10-34 J∙ s)

Accepted Answer

Question 19

An α particle is also known as

Accepted Answer

A) an electron. 
B) a positron. 
C) a helium nucleus. 
D) a high-energy photon. 
A) an electron. 
B) a positron. 
C) a helium nucleus. 
D) a high-energy photon.

Question 20

Uranium-238 decays into thorium-234 plus an alpha particle.The known masses are ${}^{4}_{2}$ He: 4.002603 u $^{224}
_{90} Th$: 234.043583 u $^{238}
_{92} U$: 238.050786 u How much energy is released in this process? (1 u = 931.5 MeV/c2)

Accepted Answer

A) 4.28 MeV 
B) 3.76 MeV 
C) 3.18 MeV 
D) 2.89 MeV 
E) 5.05 MeV 
A) 4.28 MeV 
B) 3.76 MeV 
C) 3.18 MeV 
D) 2.89 MeV 
E) 5.05 MeV

Exam 29: Nuclear Physics

The primary reason that very large nuclei are unstable is due to

How many protons,neutrons,and nucleons are there in a carbon-14 nucleus?

What is the mass number of alpha particles?

During β+ decay

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)

Determine the missing product X in the following nuclear reaction: 713N^{13} _{7} N713​N + neutron → X + alpha particle

Polonium-215, 84215Po^{215}_{84} Po84215​Po ,undergoes alpha decay with a half-life of 1.8 ms. (a)What percent of the original polonium-215 is left after 0.010 s? (b)How many protons and neutrons does the daughter nucleus contain?

In beta-minus decay

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

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

The atomic mass unit is defined as

Neodymium 60144Nd^{144}_{60} Nd60144​Nd is an isotope that undergoes alpha decay.What isotope is the product of this decay?

Determine the missing product X in the following nuclear reaction: 10 5 B + neutron → X + alpha particle

A hypothetical particle has a mass of 510 MeV/c2.If such a particle at rest decays into two gamma-ray photons,what is the wavelength of each photon? (1 eV = 1.60 × 10-19 J,c = 3.00 × 108 m/s,h = 6.626 × 10-34 J∙ s)

An α particle is also known as

Uranium-238 decays into thorium-234 plus an alpha particle.The known masses are 24{}^{4}_{2}24​ He: 4.002603 u 90224Th^{224}_{90} Th90224​Th : 234.043583 u 92238U^{238}_{92} U92238​U : 238.050786 u How much energy is released in this process? (1 u = 931.5 MeV/c2)

Introduction

Kinematics: Motion in One Dimension

Newtonian Mechanics

Applying Newtons Laws

Circular Motion

Impulse and Linear Momentum

Work and Energy

Extended Bodies at Rest

Rotational Motion

Gases

Static Fluids

Fluids in Motion

First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge force and Energy

The Electric Field

Dc Circuits

Magnetism

Electromagnetic Induction

Vibrational Motion

Mechanical Waves

Reflection and Refraction

Mirrors and Lenses

Wave Optics

Electromagnetic Waves

Special Relativity

Quantum Optics

Atomic Physics

Particle Physics

Filters

During β⁺ decay

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)

Determine the missing product X in the following nuclear reaction: $^{13} _{7} N$ + neutron → X + alpha particle

Polonium-215, $^{215}_{84} Po$ ,undergoes alpha decay with a half-life of 1.8 ms. (a)What percent of the original polonium-215 is left after 0.010 s? (b)How many protons and neutrons does the daughter nucleus contain?

Neodymium $^{144}_{60} Nd$ is an isotope that undergoes alpha decay.What isotope is the product of this decay?

A hypothetical particle has a mass of 510 MeV/c².If such a particle at rest decays into two gamma-ray photons,what is the wavelength of each photon? (1 eV = 1.60 × 10^-19 J,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J∙ s)

Uranium-238 decays into thorium-234 plus an alpha particle.The known masses are ${}^{4}_{2}$ He: 4.002603 u $^{224}_{90} Th$ : 234.043583 u $^{238}_{92} U$ : 238.050786 u How much energy is released in this process? (1 u = 931.5 MeV/c²)