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Chemistry of Life
Vocabulary
Term | Definition |
---|---|
Mass | Quantity of matter an object has. |
Weight | The pull of gravity on an object. |
Element | A pure substance made of only one kind of atom. |
Compound | A pure substance made up of atoms of two or more elements. Examples are water and carbon dioxide. |
Energy | Chemical bonds can store what? |
Covalent Bonds | Formed when two atoms share one or more pairs of electrons. |
Polar Molecules | Molecules with an unequal distribution of electrical charge. |
Nonpolar Molecules | Molecules with an equal distribution of electrical charge. |
Ion | `An atom or molecule that has gained or lost one or more electrons. |
Cohesion | An attraction between substances of the same kind. Water attracted to water. |
Adhesion | An attraction between different substances. |
Solution | A mixture in which 2 or more substances are uniformly distributed in another substance. |
Solute | The substance dissolved in the solution. |
Solvent | The substance in which the solute is dissolved. |
Water | The universal solvent. |
Acids | Release hydrogen ions in solution. |
Bases | Release hydroxide ions in solution. |
Buffer | Neutralize small amounts of either an acid or base added to a solution. |