Conceptual Physics Homework 7

When radium (atomic number 88) emits an alpha particle, the resulting nucleus has an atomic number of "None of the other answers is correct" "86" "90" "88"

"86"

When thorium (atomic number 90) emits an alpha particle, the resulting nucleus has an atomic number of "92" "90" "88" "None of the other answers is correct"

"88"

When a heavy atom undergoes fission there is a resulting loss in mass. When two light elements are fused, there is _____. "An increase in mass" "A decrease in mass" "All of the other answers are correct" "No change in mass"

"A decrease in mass"

When a radioactive atom decays, it turns into _____. "A nucleon" "An ion" "An isotope" "A different element" "An elementary particle"

"A different element"

The fissioning of an iron nucleus would yield a net "Release of energy" "Absorption of energy"

"Absorption of energy"

The number of nucleons in a nucleus is reduced in natural radioactivity by _____ decay. "Gamma" "Alpha" "Beta" "All of the other answers are correct"

"Alpha"

Which will be deflected the most in an electric field? "A gamma ray" "A beta particle" "An alpha particle"

"An alpha particle"

An atom with an imbalance of orbital electrons to protons is "An ion" "A hadron" "None of the other answers is correct" "A baryon" "An isotope"

"An ion"

The four nucleons which are combined to form a helium nucleus _____. "Are held together by electrical forces" "Attract each other because they have like charges" "Contain more mass than the helium nucleus" "Contain less mass than the helium nucleus" "All of the other answers are correct"

"Contain more mass than the helium nucleus"

Most radiation exposure to the average person is from "Nuclear power plants and weapons tests fallour" "Medical and dental x-rays" "Cosmic rays and Earth minerals"

"Cosmic rays and Earth minerals"

The radiation damage to living tissue is most detrimental when cells are "Damaged, but not killed" "Killed"

"Damaged, but not killed"

When a nucleus emits a positron, its atomic number "Doesn't change" "Increases by 1" "Decreases"

"Decreases"

Atoms are radioactive when _____. "Electrons are excited by collisions with other atoms." "All of the other answers are correct" "Two of the other answers are correct" "Electrical forces exceed the strong nuclear force." "They oscillate at frequencies identical to radio."

"Electrical forces exceed the strong nuclear force.''

If gold were to be used for a nuclear fuel, it would best be "Fused" "Fissioned" "Either would be equivalent"

"Fissioned"

If carbon were to be used for a nuclear fuel, it would best be "Either would be equivalent" "Fissionable" "Fused"

"Fused"

The nuclear reaction which is not accompanied by radio- active by-products is _____. "None of the other answers are correct" "Fussion" "Fission"

"Fussion"

An alpha particle is really a(n)_____. "Neutron" "None of the other answers is correct" "Helium nucleus" "Electron" "Photon"

"Helium nucleus"

The mass of a proton is greater if it is in the nucleus of "Same in each" "Uranium" "Hydrogen" "Iron"

"Hydrogen"

When a nucleus emits a beta particle, its atomic number "Increass by 2" "Increases by 1" "Decreases by 2" "None of the other answers is correct" "Decreases by 1"

"Increases by 1"

The electrical forces within the atomic nucleus contribute to the "Stability of the nucleus" "Instability of the nucleus" "Neither"

"Instability of the nucleus"

The mass of a proton is least if it is in the nucleus of "Uranium" "Iron" "Hydrogen" "Same in each"

"Iron"

Uranium-235, uranium-238, and uranium-239 are different "Isotopes of uranium" "None of the other answers is correct" "Elements" "Ions of uranium"

"Isotopes of uranium"

In both nuclear fission and fusion reactions, the amount of mass that is converted to energy is "About 10 percent" "Less than 1 percent" "More than 10 percent"

"Less than 1 percent"

In gaseous form at the same temperature, the average speed of U-238 is "The same as U-235" "Less than U-235" "Greater than U-235"

"Less than U-235"

Compared to the fissioning of a single uranium atom, the energy produced by the fusing of a pair of deuterium atoms is "More" "Less" "About the same''

"Less"

Compared to the fissioning of a gram of uranium atoms, the energy produced by the fusing of a gram of deuterium atoms is "More" "About the same" "Less"

"More"

If iron were to be used for a nuclear fuel, it would best be "Fissioned" "Fused" "Neither would produce energy"

"Neither would produce energy"

The difference between isotopes of the same element has to do with varying numbers of "Hadrons" "Nucleons" "Photons" "Protons" "Neutrons"

"Neutrons"

The principle reason a neutron makes a better nuclear bullet than a proton in atom-smashing devices has to do with the fact that a neutron has "No electric charge" "Less mass than proton" "None of the other answers is correct" "A larger cross-section than a proton" "More penetrating power than a proton"

"No electric charge"

When thorium (atomic number 90) emits a beta particle, the resulting nucleus has an atomic number of "92" "90" "None of the other answers is correct" "88"

"None of the other answers is correct"

The mass of a proton or neutron is greater when it is located "Inside the atomic nucleus" "Same in either case" "Outside the atomic nucleus"

"Outside the atomic nucleus"

The electric forces within the atomic nucleus tend to "None of the other answers is correct" "Push it apart" "Hold it together"

"Push it apart"

The fissioning of a lead nucleus would yield a net "Release of energy" "Absorption of energy"

"Release of energy"

The fusing of a pair of helium nuclei would yield a net "Absorption of energy" "Release of energy"

"Release of energy"

To compute the energy released by the conversion of a given amount of mass completely into energy, one must know _____. "The wavelength of an electron" "The speed of light" "The element involved" "The temperature" "All of the other answers are correct"

"The speed of light"

If an element emits 1 alpha particle, then 1 positron, then 3 beta particles, its atomic number will be "Increased by 1" "Decreased by 1" "Decreased by 2" "Increased by 2" "Unchanged"

"Unchanged"

Generally speaking, the larger a nucleus is, the more it tends to be "Unstable" "Stable"

"Unstable"

When a nucleus emits a beta particle, its atomic umber undergoes "No change, just as its atomic mass doesn't change" "No change, but its atomic mass does change" "None of the other answers is correct" "A change, as does its atomic mass" "A change, but its atomic mass doesn't change"

''A change, but its atomic mass doesn't change"

The fissioning of a helium nucleus would yield a net "Absorption of energy" "Release of energy"

Absorption of energy"

The fusing of a pair of iron nuclei would yield a net "Release of energy" "Absorption of energy"

Absorption of energy"