Chapter 13 Flashcards

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1
Q

Nucleus

A

The center of an atom, containing the protons and neutrons

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2
Q

Atomic Number

A

The number of protons in an atom

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3
Q

Mass Number

A

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

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4
Q

Isotopes

A

Two or more atoms that have the same number of protons but different numbers of neutrons

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5
Q

Element

A

A collections of atoms that all have the same number of protons

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6
Q

Radioactive Isotope

A

An atom whose nucleus is not stable

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