28 practice sets · Page 1 of 2
Why do heavier nuclei have a greater ratio of neutrons to protons than lighter nuclei?
to add more nucleons so that the binding energy is greater.
to provide a greater weak nuclear force.
to provide more attractive electromagnetic force.
to provide more attractive strong nuclear force to balance the repulsive electromagnetic force.
Why are nuclear energy levels more complex than electron energy levels?
Nuclear energy levels depend only on attractive forces.
Nuclear energy levels depend on attractive and repulsive forces.
Nuclear energy levels are an order of one hundred times as great as electron energy levels.
Electron energy levels depend on the interaction between neutrons and electrons.
Which type of radiation is stopped by a sheet of paper?
alpha particle
beta particle
Gamma ray
X-ray
Which of the following statements about the mass of an atom is true?
It is evenly divided between the protons and the orbiting electrons.
It is evenly divided between the nucleons and the orbiting electrons.
It is concentrated in the electron cloud.
It is concentrated in the nucleus.
Which of the following particles has the smallest mass?
Proton
Electron
Neutron
Nucleus
Which of the following is the Beta particle?
0e+1
0e-1
1n0
1H1
Which of the following is correct for the number of neutrons in the nucleus?
N = A –Z
N = Z – A
N = Z +A
N = Z
Which of the following about the nuclear force is true?
It is an attractive force between electrons and protons in an atom.
It is an attractive force between electrons and neutrons in an atom.
It is much weaker than the electromagnetic force.
It is a strong, short-range, attractive force between the nucleons.
Which of the following about the gamma ray is true?
It carries a positive charge.
It carries a negative charge.
It can be deflected by a magnetic field.
It has zero rest mass and a neutral charge.
When nucleons form a stable nucleus, binding energy is:
created from nothing.
destroyed into nothing.
transformed into visible light.
released as high energy photons or particles.
When a nucleus is divided into its constituents, energy is:
created from nothing.
destroyed into nothing.
transformed into visible light.
absorbed by the nucleus which then breaks it apart.
What law did Ernest Rutherford use to estimate the size of the nucleus?
Conservation of nucleon number
Conservation of angular momentum
Conservation of linear momentum
Conservation of energy
What force is responsible for the radioactive decay of the nucleus?
Gravitational force
Weak Nuclear force
Strong Nuclear force
Electromagnetic force
The following reaction: 2H1 + 3H+1 -> 4He2 + 1n0 is called:
Fusion
Fission
alpha decay
beta decay
The following reaction: 1n+0 + 235U92 -> 141Ba56 + 92Kr36 + 31n0 is called:
Fusion
Fission
alpha decay
beta decay
The atomic number is equivalent to which of the following?
The number of neutrons in the atom.
The number of protons in the atom.
The number of nucleons in the atom.
The number of alpha-particles in the atom.
The atomic mass number is equivalent to which of the following?
The number of neutrons in the atom.
The number of protons in the atom.
The number of nucleons in the atom
The number of alpha-particles in the atom.
Isotopes of an element:
have the same number of protons and electrons, but a different number of neutrons.
have the same number of protons and neutrons, but a different number of electrons.
have different number of protons.
have different number of electrons.
How many protons are in the 14N7 atom?
14
6
7
10
How many nucleons are in the 20Ne10 atom?
12
30
18
20
