PSC 1121 Final Exam Review || with Errorless Solutions
100%.
What is all matter made of? correct answers Very small units called atoms
What do atoms contain in the nucleus? correct answers Protons and neutrons
What is the charge of a Proton? correct answers +1
What is the charge of a Neutron? correct answers No charge
What is the charge of an Electron? correct answers -1
What is the mass of a Proton? correct answers 1 atomic mass unit
What is the mass of a Neutron? correct answers 1 atomic mass unit
What is the mass of an Electron? correct answers Almost 0 atomic mass unit
What are isotopes? correct answers Different forms of the same element
Why do isotopes have the same atomic number but different mass? correct answers Because they
have different number of neutrons
What is nuclear radiation? correct answers Invisible but penetrating radiation
What are the four different types of nuclear radiation? correct answers Alpha particles, beta
particles, gamma rays, and positron
What are alpha particles and what do they contain? correct answers In effect, they are helium
nuclei. They contain two protons and two neutrons.
How much energy do alpha particles have? correct answers Relatively small energy
What can alpha particles be stopped by? correct answers Thin layers, such as paper or skin
What are beta particles? correct answers Electrons emitted from the nucleus of an atom
How much energy do beta particles have? correct answers Higher energy than alpha particles,
but less energy than gamma rays
What can beta particles be stopped by? correct answers Thicker layers or by metals such as
aluminum
What are gamma rays? correct answers Electromagnetic waves emitted by the nucleus of an
atom
How much energy do gamma rays have? correct answers They are similar in energy to X-rays
What can gamma rays not be stopped by? correct answers They cannot be stopped by very thick
materials such as a slab of lead
What is positron? correct answers The conversion of a proton to a neutron with emission of this
particle.
What charge does a positron have? correct answers Positive charge
What is "half-life"? correct answers The period of time in which one-half of the initial amount of
a nuclei de takes to decay
What is binding energy? correct answers Energy holding the nucleus of an atom together.
Where does binding energy come from? correct answers The mass of the particles in the nucleus
through a conversion of mass to energy
When does nuclear fission occur? correct answers When a large nucleus breaks up into smaller
ones
When does nuclear fusion occur? correct answers When small nuclei fuse or join together to
form larger atoms
For the symbols of the elements, which letter is always capitalized? correct answers The first
letter
100%.
What is all matter made of? correct answers Very small units called atoms
What do atoms contain in the nucleus? correct answers Protons and neutrons
What is the charge of a Proton? correct answers +1
What is the charge of a Neutron? correct answers No charge
What is the charge of an Electron? correct answers -1
What is the mass of a Proton? correct answers 1 atomic mass unit
What is the mass of a Neutron? correct answers 1 atomic mass unit
What is the mass of an Electron? correct answers Almost 0 atomic mass unit
What are isotopes? correct answers Different forms of the same element
Why do isotopes have the same atomic number but different mass? correct answers Because they
have different number of neutrons
What is nuclear radiation? correct answers Invisible but penetrating radiation
What are the four different types of nuclear radiation? correct answers Alpha particles, beta
particles, gamma rays, and positron
What are alpha particles and what do they contain? correct answers In effect, they are helium
nuclei. They contain two protons and two neutrons.
How much energy do alpha particles have? correct answers Relatively small energy
What can alpha particles be stopped by? correct answers Thin layers, such as paper or skin
What are beta particles? correct answers Electrons emitted from the nucleus of an atom
How much energy do beta particles have? correct answers Higher energy than alpha particles,
but less energy than gamma rays
What can beta particles be stopped by? correct answers Thicker layers or by metals such as
aluminum
What are gamma rays? correct answers Electromagnetic waves emitted by the nucleus of an
atom
How much energy do gamma rays have? correct answers They are similar in energy to X-rays
What can gamma rays not be stopped by? correct answers They cannot be stopped by very thick
materials such as a slab of lead
What is positron? correct answers The conversion of a proton to a neutron with emission of this
particle.
What charge does a positron have? correct answers Positive charge
What is "half-life"? correct answers The period of time in which one-half of the initial amount of
a nuclei de takes to decay
What is binding energy? correct answers Energy holding the nucleus of an atom together.
Where does binding energy come from? correct answers The mass of the particles in the nucleus
through a conversion of mass to energy
When does nuclear fission occur? correct answers When a large nucleus breaks up into smaller
ones
When does nuclear fusion occur? correct answers When small nuclei fuse or join together to
form larger atoms
For the symbols of the elements, which letter is always capitalized? correct answers The first
letter
