Unit 1 Atomic Structure Test Review

Which atomic particle has a negative charge?

• proton
• neutron
• electron
• all of the above

Which of these phrases best describes an atom?

• a positive nucleus surrounded by a hard negative shell
• a positive nucleus surrounded by a cloud of negative charges
• a hard sphere with postive and negative charges on the outside
• a negative nucleus surrounded by protons and neutrons

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Which of the following particles has the smallest mass?

• neutron
• proton
• nucleus
• electron

What is true about an atom?

• Most of the space in an atom is taken up by the nucleus
• Atoms are mostly empty space
• Atoms have no mass
• Electrons have much more mass that protons or neutrons.

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The positively charged parts of an atom are the

• protons
• electron clouds
• neutrons
• electrons

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Matter that is made up on only one type of atom is called

• a compound
• a subatomic particle
• an element
• water

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The term "neutral" means

• having only a little bit of charge
• having a positive charge
• having a negative charge
• having no charge at all

Atoms are neutral because they have the same number of

• protons and neutrons
• protons and electrons
• electrons and neutrons

A substance that cannot be broken down into other substances by chemical or physical means.

• Covalent bond

• Atom

• Element

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What is one way Neutrons are different from electrons?

• they both are negative

• neutrons have no charge, while electrons have a negative charge

• Both are in the nucleus( center of atom)

• Electrons are inside nucleus and neutrons are outside the nucleus.

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