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Chapter 3 Anatomy
Anatomy terms
| Term | Definition |
|---|---|
| Element | Said to be “pure” in the sense that it cannot be broken down or decom-posed into two or more different substances |
| Compounds | Two or more elements are joined to form chemical combinations |
| Octet rule | Atoms with fewer than eight electrons in the outer energy level will attempt to lose, gain, or share electrons with other atoms to achieve stability. |
| Isotopes | Contain the same number of protons but different numbers of neutrons. |
| Ionic Bonds | Chemical bond formed by the transfer of electrons from one atom to another |
| Covalent Bonds | Chemical bond formed by the sharing of one or more pairs of electrons between the outer energy levels of two atoms |
| Hydrogen bonds | Are much weaker forces than ionic or covalent bonds because they require less energy to break. Can exist between biologically important molecules. |
| Decomposition reactions | Result in the breakdown of a complex substance into two or more simpler substances. |
| Exchange reactions | Permits two different reactants to exchange components and, as a result, form two new products |
| Reversible reactions | Proceed in both directions. |
| Metabolism | All the chemical reactions that occur in body cells. |
| Catabolism | Chemical reactions that break down larger food molecules into smaller chemical units and, in so doing, often release energy |
| Anabolism | Chemical reactions that build larger and more complex chemical molecules from smaller subunits. Require energy. |
| Salt | Any compound that results from the chemical interaction of an acid and a base |
Created by:
Gdstoddart
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