3F - 7. Nuclear Energy

What is the central part of an atom called?

• Neutron

• Electron

• Nucleus

• Proton

What charge do protons have?

• Variable

• Neutral

• Positive

• Negative

What are isotopes?

• Atoms with the same number of protons

• Atoms with different atomic numbers

• Atoms with different mass numbers

• Atoms with identical chemical properties

Which particles are emitted during alpha decay?

• Electrons

• Alpha particles

• Gamma rays

• Beta particles

What is the term for the time taken for half of the nuclei in a sample to decay?

• Decay rate

• Half-life

• Activity

• Radiation period

Which type of radiation is the most penetrating?

• Alpha particles

• Neutrons

• Beta particles

• Gamma rays

What is the mass number of an atom?

• Number of protons only

• Total number of protons and neutrons

• Number of neutrons only

• Total number of electrons and protons

What happens to an atom when it becomes an ion?

• It gains or loses electrons

• It gains or loses neutrons

• It gains or loses mass

• It gains or loses protons

What is the main force that holds protons and neutrons together in the nucleus?

• Strong nuclear force

• Electromagnetic force

• Weak nuclear force

• Gravitational force

Which of the following is a characteristic of beta decay?

• Mass number decreases by 4

• Atomic number decreases by 2

• Atomic number increases by 1

• No change in atomic number