Atomic Structure Flashcards by Andrew Rutt | Brainscape

Q

Atom

A

The smallest unit of an element

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Q

Electron

A

A subatomic particle with a negative charge

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Q

Nucleus

A

An atom’s central region. ( protons, neutrons)

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Q

Proton

A

Subatomic particle with a positive charge

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Q

Neutron

A

A subatomic with no charge

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Q

Electron cloud

A

A region around the nucleus of an atom

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Q

Atomic number

A

The number of protons in the nucleus

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Q

Mass number

A

The sum of the numbers of protons and neutrons

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