Nuclear Chemistry

Open Ended

Why is the study of nuclear chemistry important in our daily lives?

Multiple Choice

Which particles are found in the nucleus of an atom?

• Protons and neutrons

• Electrons and protons

• Neutrons and electrons

• Only protons

Open Ended

What causes a nucleus to 'change'?

Multiple Choice

Which force is responsible for overcoming the repulsion between protons in the nucleus?

• Strong nuclear force

• Gravitational force

• Electromagnetic force

• Weak nuclear force

Open Ended

Explain how neutrons contribute to the stability of the atomic nucleus.

Multiple Select

Select all statements that are true about the strong nuclear force.

• It acts over very short distances within the nucleus.

• It is billions of times stronger than gravity.

• It acts between electrons and protons.

• It is responsible for keeping protons together in the nucleus.

Fill in the Blanks

The strong nuclear force is

times stronger than gravity.

Multiple Choice

What happens if there are too few or too many neutrons in a nucleus?

• The atom becomes stable.

• The atom will spontaneously eject particles from the nucleus.

• The atom will gain electrons.

• The atom will lose protons.

Fill in the Blanks

Atoms that spontaneously emit particles out of their nucleus are called

.

Multiple Choice

Which of the following statements best describes gamma emission?

• The nucleus emits a photon of pure energy with no charge and no mass.

• The nucleus emits two protons and two neutrons.

• The nucleus emits a high-speed electron.

• The nucleus emits a positron.

Multiple Choice

After beta emission, how does the composition of an atom change?

• It has one less neutron and one more proton.

• It has two fewer protons and two fewer neutrons.

• It has no change in atomic composition.

• It has one more neutron and one less proton.

Open Ended

Compare the ability of alpha, beta, and gamma emissions to penetrate materials. What does this tell you about their relative energies and dangers?

Open Ended

Why must mass numbers and atomic numbers be equal on both sides of a nuclear equation?

Fill in the Blanks

What product is formed when Ra-226 undergoes alpha decay?

Multiple Choice

Which of the following statements best explains why mass numbers and atomic numbers must be equal on both sides of a beta emission equation?

• To ensure the conservation of mass and charge during the reaction.

• To balance the number of neutrons only.

• To make the equation easier to solve.

• To ensure the emission of gamma particles.

Fill in the Blanks

What product is formed when Ac-227 undergoes beta decay?

Multiple Select

Based on the information provided, which atoms are considered radioactive? Select all that apply.

• Atoms with more than 83 protons

• Atoms with less than 20 protons

• Atoms with a non-optimal proton to neutron ratio

• Atoms with exactly 83 protons

Multiple Choice

Which type of nuclear emission is most likely for an atom with a proton to neutron ratio below the belt of stability?

• Alpha decay

• Beta decay

• Positron emission or electron capture

• Gamma emission

Open Ended

Explain how the 'belt of stability' helps predict whether an atom will undergo radioactive decay. Use the graph and description provided.

Open Ended

How has your understanding of nuclear chemistry changed after this lesson? Is there anything you would like to learn more about?

Fill in the Blanks

What are the two types of particles found in the nucleus of an atom, and what are their electrical charges?