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Chemical bonds
Atoms sharing or transfer valence electrons
Colvalent bond
Sharing of a pair of valence electrons by two atoms
Molecule
Two or more atoms held together by covalent bonds
Single bond
A pair of shared electrons
Double bond
Sharing two pairs of valence electrons
Atom's Valence
Bonding capacity. Usually equal to the number of unpaired electrons required to complete atoms valence shell.
Electronegativity
Attraction of a particular atom for the electrons of a covalent bond
Nonpolar covalent bond
Covalent bond two atoms of the same element. Electrons shared have the same electronegativity.
Polar covalent bond
When an atom is bonded to a more electronegative atom, the electrons of the bond are not shared equally
Ions
Two opposite charged atoms or molecules
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