Unit 10 Nuclear Chemistry

Which of the following correctly describes how chemical processes and nuclear processes are similar?

• In both types of processes, the identity of the atom remains the same.

• In both types of processes, the amount of energy released is approximately the same.

• In both types of processes, mass is conserved.

• In both types of processes, only electrons are exchanged between atoms.

What is an alpha particle?

• A fast moving electron

• A particle with 2 protons and 2 neutrons

• A photon that is high electromagnetic energy

• An emitted neutron

Tags

NGSS.HS-PS1-8

Which of the following is an example of a nuclear reaction?

• Neptunium (Np) emits a gamma ray

• A piece of silver (Ag) tarnishes

• A sample of pure iron (Fe) emits heat as it cools

• All of the above are examples of nuclear reactions

Observe the nuclear reaction below. What type of radiation was emitted?

• An alpha particle

• A gamma ray

• A beta particle

• Nuclear fusion

Observe the nuclear. What element is formed from the decay of polonium?

• Helium (He)

• Radon (Rn)

• Thallium (Tl)

• Lead (Pb)

Thallium-202 (Tl-202) goes through gamma decay. What atom results from this decay?

• Pb-202

• Ir-198

• Tl-202

• Tl-201

At what point will a radioactive atom stop undergoing radioactive decay?

• When a stable, non-radioactive atom forms

• When each type of radiation has been emitted

• When the nucleus has doubled in mass

• When it has emitted half of its energy

Tags

NGSS.HS-PS1-8

What would make an atom radioactive?

• If it had a complex electron configuration

• If its neutron to proton ratio was high

• If its typically unreactive in nature

• If it is found in rocks

According to the diagram, which letter represents a beta particle?

• A

• B

• C

An unstable isotope of potassium-40 naturally transforms into a stable isotope of argon-40. What process occurred?

• Radioactive decay

• Nuclear fusion

• Nuclear fission

• Decomposition