Understanding Atoms and Subatomic Particles

What are atoms described as in the video?

• Tiny particles that are basic units of matter

• Invisible particles that cannot be detected

• Large particles that make up matter

• Particles that only exist in living organisms

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

• Protons, neutrons, and photons

• Protons, neutrons, and electrons

• Electrons, neutrons, and quarks

• Protons, electrons, and neutrinos

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Where are protons and neutrons located in an atom?

• In the atomic orbitals

• In the outer shell

• In the electron cloud

• In the nucleus

What is the electron cloud?

• The area where the nucleus is located

• The area where electrons are most likely to be found

• The area where protons are found

• The area where neutrons are found

What charge do protons have?

• No charge

• Positive

• Neutral

• Negative

What charge do electrons have?

• No charge

• Negative

• Neutral

• Positive

What is the mass of a proton or neutron in unified atomic mass units (U)?

• 0.5 U

• 2 U

• 1 U

• 0.0005 U

How does the mass of an electron compare to that of a proton or neutron?

• It is twice as large

• It is about 2,000 times larger

• It is roughly the same

• It is about 2,000 times smaller

Where does nearly all the mass of an atom reside?

• In the atomic orbitals

• In the outer shell

• In the electron cloud

• In the nucleus

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What commonality do the air we breathe, the water we drink, and the cell phones we use share?

• They all have the same mass

• They all have the same charge

• They are all composed of the same subatomic particles

• They are all made up of different subatomic particles

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