Physics 2020 M11 Hw

Which of the following isotopes is radioactive?: Carbon-12 Carbon-14 both of these neither of these

Carbon-14

An element will decay to an element with higher atomic number in the periodic table if it emits: a gamma ray. an alpha particle. a beta particle. a proton. none of the above

a beta particle.

A quark is a fundamental particle: that makes up a nucleon. not composed of smaller parts. much smaller than a nucleon. all of the above none of the above

all of the above

Human damage is usually highest for radiation by: alpha particles. beta particles. either of the above none of the above

alpha particles.

Pure elements can be transformed into entirely different elements by: transmutation. radioactive decay. both of these neither of these

both of these

A device that shows the bending of particle trails in liquid hydrogen is a: spark chamber. streamer chamber. bubble chamber. all of the above none of the above

bubble chamber.

The sources of X-rays are: electron clouds. the atomic nucleus. both of these neither of these

electron clouds.

When an element undergoes nuclear transmutation, the result is a completely different: element. isotope of the same element. ion of the same element.

element.

Which will NOT bend when moving in a magnetic field?: beta particle alpha particle gamma ray all bend the same

gamma ray

Rays with the shortest wavelengths have the: lowest frequencies and energies. lowest frequencies but highest energies. highest frequencies and energies.

highest frequencies and energies.

A hydrogen atom that emits an alpha particle is a routine occurrence in: unlikely. laboratories. the environment. impossible.

impossible.

Generally speaking, the larger a nucleus is, the greater its: instability. stability. neither stability nor instability

instability.

All deposits of natural uranium contain appreciable amounts of: lead. gold. iron. all of the above none of the above

lead.

The fate of the world's uranium supply is to eventually become: iron. alpha and beta particles. lead.

lead.

Which is the strongest fundamental force?: gravitational force. nuclear strong force. electric force. none of the above

nuclear strong force.

For an isotope with a half-life of one day, at the end of three days the amount that remains is: none. one-half. one-eighth. one-quarter. none of the above

one-eighth.

For an isotope with a half-life of one day, at the end of two days the amount that remains is: none. one-half. one-eighth. one-quarter. none of the above

one-quarter.

Carbon dating requires that the object being tested contain: charcoal. organic material. inorganic material. none of the above

organic material.

A nucleon is either a: proton or a neutron. neutron or an electron. proton or an electron. positron or an electron.

proton or a neutron.

The high temperature of Earth's interior is mainly due to: radioactive processes. great internal pressure. the Earth's natural heat. friction, as plates move past one another.

radioactive processes.

Radiation dosage is commonly measured in: gram rads. joules. none of the above

rads.

When the nucleus of an atom emits only a gamma ray, the atom's atomic number: remains unchanged. increases. decreases.

remains unchanged.

Which device is used primarily to detect nuclear radiation?: linear accelerator synchrotron cyclotron scintillation counter none of the above

scintillation counter

The mass of an atomic nucleon is nearly: a thousand times that of an electron. two thousand times that of an electron. twice that of an electron. four times that of an electron.

two thousand times that of an electron.

Which nucleus has the greatest neutron/proton ratio?: uranium thorium iron gold

uranium