Atoms & Reactions

What is the smallest unit of an element?

• atom

• molecule

• cell

• nucleus

Tags

NGSS.MS-PS1-1

What are the three subatomic particles that make up an atom?

• protons, neutrons, electrons

• photons

• quarks

• muons

What is the charge of a proton?

• Positive

• Negative

• Zero

• Neutral

Where is most of the mass of an atom located?

• In the neutrons

• In the protons

• In the nucleus

• In the electrons

Tags

NGSS.HS-PS1-8

What happens during a nuclear fission reaction?

• Neutrons are absorbed by the nucleus during a nuclear fission reaction.

• A heavy atomic nucleus splits into lighter nuclei, releasing energy and neutrons.

• During a nuclear fission reaction, the nucleus remains unchanged.

• A light atomic nucleus combines into a heavier nucleus, releasing energy and protons.

Tags

NGSS.HS-PS1-8

What is the atomic number of an element?

• Number of protons

• Number of electrons

• Number of neutrons

• Number of isotopes

What is the process of combining two atomic nuclei called?

• Nuclear Fusion

• Nuclear Fission

• Nuclear Synthesis

• Atomic Fusion

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

What is the difference between nuclear fission and nuclear fusion?

• Nuclear fission combines heavy nuclei, while nuclear fusion splits light nuclei.

• Nuclear fission splits heavy nuclei, while nuclear fusion combines light nuclei.

• Nuclear fission and nuclear fusion both combine light nuclei.

• Nuclear fission and nuclear fusion both split heavy nuclei.

Tags

NGSS.HS-PS1-8

How is energy released in a nuclear reaction?

• Through chemical reactions

• Through electromagnetic radiation

• Through nuclear fission or fusion reactions

• Through gravitational interactions

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8