Nuclear chemistry
Which particle has the least mass
Beta particle
What fraction of a Sr 90 sample remains unchanged after 87.3 years
1/8
After decaying for 48 hours, 1/16th of the original mass of a radioisotope sample remains unchanged. What is the half life of this radioisotope?
12 h
Which is the mass number of an alpha particle
4
When an atom of the unstable isotope Na 24 decays it becomes an atom of Mg 24 because the Na 24 atom spontaneously releases
A beta particle
Which nuclear emission is negatively charged
A beta particle
Which particle will be attracted to the positive electrode in an electric field
A beta particle
What statement describes the relative masses of two different particles
A beta particle has less mass than a neutron
Which type of radiation is identical in mass and charge to a helium nucleus
Alpha
Which emanation is attracted toward a negatively charged electrode
Alpha particle
Which has the greatest mass
Alpha particle
Which nuclear emission has the greatest mass and the least penetrating power
Alpha particle
Which nuclear emission has the least penetrating power and the greatest ionizing able
Alpha particle
Which type of radioactive emission has a positive charge and weak penetrating power
Alpha particle
Which list of nuclear emissions is arranged in order from the least penetrating power to the greatest penetrating power
Alpha particle, beta particle, gamma ray
Which radioactive emanations have a charge of 2+
Alpha particles
An unstable nucleus loses the most mass if the nucleus emits
An alpha particle
What is the primary cause of radioactivity
An atom of an element having an incorrect ratio of neurons to protons
Radiation may be spontaneously emitted from
An unstable nucleus
Which emission causes the atomic number of a nuclide to decrease by 2 and its mass number to decrease by 4
alpha particle
Which nuclear emission has the greatest mass
alpha particle
Alpha particles and beta particles differ in
Both mass and charge
The nucleus of a radium-226 atom is unstable, which causes the nucleus to spontaneously
Decay
When an alpha particle is emitted by an atom, the atomic number of the atom will
Decrease by 2
As an atom of a radioactive isotope emits an alpha particle, the mass number of the atom
Decreases
Positions and beta particles have
Different charges and the same mass
In which process does a heavy nucleus split into two lighter nuclei
Fission
In which type of nuclei combine to form a nucleus with a greater mass
Fusion
Which of these types of nuclear radiation has the greatest penetrating power
Gamma
Which type of radiation is most similar to high energy X rays
Gamma
Which nuclear decay emission consists of energy only
Gamma radiation
Which nuclear emission has the greatest penetrating power
Gamma radiation
Which nuclear emission has no charge and no mass
Gamma ray
Which radioactive emission has the greatest penetrating power, but the least ionizing power
Gamma ray
Which list of nuclear emissions is arranged in order from the greatest penetrating power to the least penetrating power
Gamma ray, beta particle, alpha particle
An alpha particle has the same composition as a
Helium nucleus
Which statement best describes gamma radiation
It has a mass charge of 0 and a charge of 0
Compared to the mass and the penetrating power of an alpha particle, a beta particle has
Less mass and greater penetrating power
An unstable nucleus spontaneously releases a positron. This is an example of
Radioactive decay
As a radioactive element emits gamma radiation only, the atomic number of the element
Remains the same
When a beta particle is emitted by the nucleus of an atom, the mass number of the atom
Remains the same
What evidence indicates that the nuclei of strontium 90 atoms are unstable
Strontium 90 atoms spontaneously emit beta particles
