Periodic Table Vocabulary

Select the best term for the following definition:

the smallest particle of an element that retains the element’s properties

• molecule

• atom

• proton

• nucleus

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the small, positively charged center of the atom

• molecule

• atom

• proton

• nucleus

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particles in the nucleus with a charge of 1+

• molecule

• atom

• proton

• nucleus

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electrically neutral particles in the nucleus

• neutron

• electron

• proton

• nucleus

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particles with an electric charge of 1- that occupy the space surrounding the nucleus of the atom

• neutron

• electron

• proton

• nucleus

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the smaller particles that make up protons and neutrons

• particle

• quark

• nucleon

• electron

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the area around the nucleus of an atom where electrons are most likely to be found

• molecule

• electron cloud

• nucleus

• element

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the number of protons in an atom’s nucleus

• atomic mass

• average atomic mass

• atomic number

• mass number

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the weighted average mass of all naturally occurring isotopes of an element

• isotope

• average atomic mass

• atomic number

• mass number

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the sum of the number of protons and neutrons in the nucleus of an atom

• isotope

• average atomic mass

• atomic number

• mass number