Primary Atomic Bonds|
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University of Nevada Las Vegas |
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MEG301 Structures and Properties of Solids |
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Department of Mechanical Engineering |
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Fall Semester 2000 |
ATOMIC AND MOLECULAR BONDS
Primary Atomic Bonds
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Ionic bonds |
Covalent bonds |
Metallic bonds |
Ionic bonds: relatively large interatomic forces are set up by an electron transfer from one atom to another to produce ions which are bonded together by coulombic forces. Characteristics: strong, nondirectional.
Covalent bonds: relatively large interatomic forces are created by the sharing of electrons to form a bond with a localized direction. Characteristics: strong, directional.
Metallic bonds: relatively large interatomic forces are created by the sharing of electrons in a delocalized manner to form strong nondirectional bonding between atoms. Characteristics: strong, nondirectional.
Secondary Atomic and Molecular Bonds
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Permanent dipole bonds |
Fluctuating dipole bonds |
Permanent dipole bonds: relatively weak intermolecular bonds are formed between molecules which posses permanent dipoles. A dipole in a molecule exists due to asymmetry in its electron density distribution. Characteristics: weak, dipoles.
Fluctuating dipole bonds: very weak electronic dipole bonding can take place among atoms due to the asymmetrical distribution of electron densities around their nuclei. Characteristics: very weak, fluctuating.
Created by Dr. Wang
