Essay: Bonds and Compounds

Pages: 3 (776 words)  ·  Bibliography Sources: 1  ·  Level: College Senior  ·  Topic: Chemistry  ·  Buy This Paper

Chemical Bonds: Ionic and Covalent Bonding

A chemical bond is an attraction between atoms that lets chemical substances that contain two or more atoms. Two forms of chemical bonding are ionic bonding and covalent bonding. Additionally, ionic and covalent bonds can be combined to form mixtures and compounds.

Ionic and covalent bonds are formed through the bonding of two or more elements. An element is a pure substance composed of a single atom. There are currently 117 known elements with 94 elements occurring naturally and 22 artificial elements. The properties and names of all known elements can be found on the Periodic Table.

Ionic bonded and covalent bonded substances can be combined to create either a mixture or a compound. A mixture is a heterogeneous form of matter that is composed of variable proportions of molecules and atoms. The properties of a mixture include the variability of the composition that means that a mixture can be any combination of substances. In a mixture, the components that make up that mixture retain their individual characteristic properties and the components of said mixture are easily separated. Mixtures can be separated through various forms including dialysis, chromatography, and electrophoresis. In biochemistry, dialysis is the separation of molecules in a solution based on their differing rates of diffusion through a semi-permeable membrane. Chromatography is a separation method that is based on the differences in the partitioning behavior between a mobile phase and a stationary phase. Electrophoresis is the separation of substances based on the rate of movement of each component in a colloidal suspension when under the influence of an electric field.

Compounds are pure substances that are composed of two or more elements. Unlike a mixture, a compound is a homogeneous form a matter in which the elements are present in fixed proportions. Additionally, components that comprise a compound do not retain their individual properties and large inputs of energy are required to separate a compound into its separate components. Compounds are formed naturally to provide elemental stability; stability is determined by the number of electrons present in the outermost energy level of an atom.

Ionic bonds are formed when atoms link together due to the attraction of ions with opposing charges. In ionic bonding, electrons are completely transferred from one of the bonding atoms to another atom. These electrons are… [END OF PREVIEW]

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