Chemical Bonding Assignment Help
A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. Chemical bond is caused by the electrostatic force of attraction between opposite charges, or as the result of a dipole attraction. The strength of chemical bonds varies. The Covalent or ionic bonds are the strong bond and weak bonds such as dipoledipole interactions.
The two main types of bonds formed between atoms are ionic bonds and covalent bonds. The ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. Covalent bond is formed when atoms share valence electrons. Atoms do not always share the electrons equally; therefore a polar covalent bond may be the result. A metallic bond is formed when electrons are shared by two metallic atoms. Electrons are shared between two atoms in the Covalent bond. Electrons which participate in metallic bonds may be shared between any of the metal atoms in the region.
Six rules for the shared electron bond are:
- The electron-pair bond forms through the interaction of an unpaired electron on each of two atoms.
- The spins of the electrons have to be opposed.
- Once paired, the two electrons cannot take part in additional bonds.
- The electron-exchange terms for the bond involve only one wave function from each atom.
- The available electrons in the lowest energy level form the strongest bonds.
- Of two orbitals in an atom, the one that can overlap the most with an orbital from another atom will form the strongest bond.
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