Nuclear Reaction

What statement is true concerning nuclear reactions?

• A. A large portion of mass is converted into energy.

• B. Law of conservation of mass does not hold true for nuclear reactions.

• C. Half-life is the time for stable atoms to decay into unstable atoms.

• D. Nuclear reactions always emit alpha particles when undergoing decay.

Given the following equation, determine what specifically decayed from the parent atom.

23892U à ²³⁴₉₀Th + ⁴₂He

A. alpha particle

• A. alpha particle

• B beta particle

• C. gamma ray

• D. positron emission

Given the following equation, determine what specifically decayed from the parent atom.

21283Bi à ⁰_-1e + ²¹²₈₄Po

• A. alpha particle

• B. beta particle

• C. gamma ray

• D. positron emission

The time it takes half of the unstable atoms to break down and turn into new atoms with a more stable nuclei is known as:

• A. Radiation

• B. Radioactive isotope

• C. Radioactive dating

• D. Half-life

Two small atoms join to form a larger one, with a release of radiant energy. This type of reaction is considered to be:

• A. Fission

• B. Fusion

• C. Nuclear decay

• D. Chain Reaction

The following equation is an example of:

²³⁵₉₂U + ¹₀n → ⁸⁷₃₅Br + ¹⁴⁶₅₇La + 3¹ ₀n

• A. Fission

• A. Fusion

• A. Combination of 2 elements

• A. The Sun’s process of releasing energy

Which list of nuclear emissions is arranged in order from the least penetrating power to the greatest penetrating power?

• A. Alpha particle, beta particle, gamma ray

• B. Alpha particle, gamma ray, beta particle

• C. Gamma ray, beta particle, alpha particle

• D. Beta particle, alpha particle, gamma ray

Given the following equation:

²₁H + ³₁H à ⁴₂He + ¹₀n + Energy

What type of reaction is this?

• A. Fission

• B. Fusion

• C. Nuclear Decay

• D. Chain Reaction

Which is a true statement concerning nuclear waste?

• A. An example of a source of low-level waste is nuclear weapons.

• B. An example of a source of high-level waste is discarded smoke detectors.

• C. By-products created from use of radioactive materials are nuclear waste.

• d. Nuclear waste is only created from fission products in nuclear power plants.

When medical personnel select a medical tracer, what considerations are necessary?

• A. Half-life

• B. Mode of decay

• C. Level of radiation

• D. All of the above