Ionic Bonds

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24 Terms

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Chemical bond

Force that holds two atoms together

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Covalent bond

Attraction between nucleus (+) and electrons (-)

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Octet rule

The tendency of atoms to prefer to have eight electrons in the outermost energy level (valence shell)

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Ion

Atoms or groups of atoms with a positive or negative charge

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Cation

  • Positive-charged ion

  • Formed when an atom loses a valence electron

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Anion

  • Negative-charged ion

  • Formed when an atom gains a valence electron

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Groups _,_,_, will lose valence e- to have noble gas configurations

1, 2, 3

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Groups _,_,_, will gain valence e- to fill energy level

15, 16, 17

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Ionic bond

Electrostatic force that holds oppositely charged particles together

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Monatomic ions

Ions formed from a single atom

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Oxidation number

The charge of an atom

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Polyatomic ions

Ions made up of more than one atom

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Almost all polyatomic ions are ____ with the only exception being ammonium

Negative

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Crystal lattice

Strong attraction of ions results in three-dimensional geometric arrangements

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Endothermic reaction

Chemical reaction that absorbs energy

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Exothermic reaction

Chemical reaction that releases energy

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Energy of formation of ionic compounds is always _______

Exothermic

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Lattice energy

Energy needed to separate ions of an ionic compound

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Sea of Electrons

A model where valence electrons are delocalized and are free to move

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Metallic bond

The attraction of a metallic cation for delocalized electrons

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Malleable

The ability of a metal to be easily hammered into sheets

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Ductile

A metal’s ability to easily be pulled into wire

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Alloy

A mixture of elements that has metallic properties

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Transition metals are even better at conducting heat and electricity because of _ orbital electrons

d