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Ch. 5 Holt
Structure of Matter
Term | Definition |
---|---|
Chemical bond | the attractive force that holds atoms or ions together. |
Chemical Structure | the arrangement of atoms in a substance. |
Bond Length | the average distance between the nuclei of two bonded atoms. |
Bond Angle | the angle formed by two bonds to the same atom. |
Ionic Bond | a bond formed by the attraction between oppositely charged ions. |
Metallic Bond | a bond formed by the attraction between positively charged metal ions and the electrons around them. |
Covalent Bond | a bond formed when atoms share one or more pairs of electrons. |
Polyatomic Ion | an ion made of two or more atoms. |
Empirical Formula | the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio. |
Molecular Formula | a chemical formula that shows the number and kinds of atoms in a molecule, but not the arrangement of atoms. |
Polymer | a large molecule that is formed by more than five monomers, or small units. |
Carbohydrate | any organic compound that is made of carbon, hydrogen, and oxygen and that provides nutrients to the cells of living things. |
Protein | an organic compound that is made of one or more chains of amino acids and that is a principal component of all cells. |
Amino Acid | any one of 20 different organic molecules that contain a carboxyl and amino group and that combine to form proteins. |
Organic Compound | a covalently bonded compound that contains carbon, excluding carbonates and oxides. |