2.1 Notes Review Quiz The Nature of Matter

Which subatomic particles make up atoms?

• Protons, neutrons, and electrons

• Protons, neutrons, and photons

• Neutrons, electrons, and photons

• Electrons, photons, and quarks

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What is the basic unit of matter in chemistry?

• Molecule

• Atom

• Compound

• Element

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What is the charge of a proton?

• Positive

• Negative

• Neutral

• Variable

What charge do neutrons carry?

• Positive

• Negative

• Neutral

• Variable

What binds protons and neutrons together in an atom?

• Weak forces

• Magnetic forces

• Strong forces

• Gravitational forces

Where are protons and neutrons located in an atom?

• Electron cloud

• Nucleus

• Outer shell

• Orbitals

What keeps electrons in constant motion around the nucleus?

• The attraction to the positively charged nucleus

• The repulsion from other electrons

• The gravitational pull of the nucleus

• The energy of their motion

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Why do electrons remain outside the nucleus?

• They are repelled by the nucleus

• They lack sufficient energy to enter the nucleus

• They are attracted to the positively charged nucleus but remain outside due to their motion

• They are too large to fit inside the nucleus

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Why are atoms electrically neutral?

• They have more protons than electrons.

• They have more electrons than protons.

• They have equal numbers of electrons and protons.

• They have no protons or electrons.

How many protons and electrons does the carbon atom shown have?

• 5 protons and 5 electrons

• 6 protons and 6 electrons

• 7 protons and 7 electrons

• 8 protons and 8 electrons.

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