Chapter 5- Atomic Structure
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Last updated 7:35 AM on 8/2/22
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11 Terms
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Isotopes
Atoms of the same element with the same number of electrons and protons but different number of neutrons.
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Atoms
________ lose or gain electrons to become either positive ions (cations) or negative ions (anions)
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Protons
Sub-atomic particles with a positive charge.
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equal number of protons
Since an atom has a(n) ________ and electrons, it is neutral (no charge)
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Electrons
Sub-atomic particles with a negative charge.
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Proton number
Number of protons (and therefore electrons) in an atom.
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Sub-atomic particles
A particle that composes an atom.
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Mass Number
Number of protons and neutrons in an atom.
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Electronic configuration
The distribution of electrons of an atom or molecule in atomic or molecular orbitals.
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Valence electrons.
The electrons in the last shell of an atom.
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Ions
An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
