Pre-Assessment Quiz on Nuclear Reactions

What is alpha decay?

• The process by which a nucleus emits an electron

• The release of electromagnetic radiation from the nucleus

• The splitting of a heavy nucleus into two lighter nuclei

• The emission of 2 protons and 2 neutrons from the nucleus

During beta decay, a neutron in the nucleus of an atom is transformed into:

• A proton and emits a gamma ray

• A proton and emits an electron

• An alpha particle

• A proton and a neutron

Gamma decay involves:

• The emission of helium nuclei

• The conversion of neutrons into protons

• The release of electromagnetic radiation without changing the number of protons or neutrons in the nucleus

• The splitting of the nucleus into smaller parts

Nuclear fission is best described as:

• The combination of two light nuclei to form a heavier nucleus

• The process of a nucleus emitting an alpha particle

• The splitting of a heavy nucleus into two lighter nuclei, along with the release of energy

• The transformation of a neutron into a proton

Nuclear fusion occurs when:

• A nucleus emits a gamma ray

• A heavy nucleus splits into two

• Two light nuclei combine to form a heavier nucleus

• A nucleus emits an alpha particle

The half-life of a radioactive isotope is the time required for:

• The isotope to completely decay into its daughter isotopes

• Half of the radioactive atoms in a sample to decay

• The activity of the radioactive substance to reduce by half

• Both B and C are correct

If a sample has a half-life of 10 years, how much of the original sample will remain after 30 years?

• 12.5%

• 25%

• 50%

• 75%

Which process is responsible for the energy production in the Sun?

• Nuclear fission

• Alpha decay

• Beta decay

• Nuclear fusion

radioactivity is

• the energy that came from radius

• The energy that is released from the nucleus of the atom

• the energy that is released from the outer shell of the atom

The Radioactive decay is completely

• Spontaneous

• Programed

• Controlled