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Ch 2 Sec 1 and 2
| Question | Answer |
|---|---|
| Atom | the defining structure of an element, which cannot be broken by any chemical means. A typical atom consists of a nucleus of protons and neutrons with electrons orbiting this nucleus. |
| Nucleus | membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. |
| Electron | a negatively charged partical with 1/1840 the mass of a proton |
| Element | Any material that is composed of only one type of atom |
| Isotope | variants of a particular chemical element. While all isotopes of a given element share the same number of protons, each isotope differs from the others in its number of neutrons. |
| Compound | combinations of two or more elements |
| Atom | the defining structure of an element, which cannot be broken by any chemical means. A typical atom consists of a nucleus of protons and neutrons with electrons orbiting this nucleus. |
| Nucleus | membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. |
| Electron | a negatively charged partical with 1/1840 the mass of a proton |
| Element | Any material that is composed of only one type of atom |
| Isotope | variants of a particular chemical element. While all isotopes of a given element share the same number of protons, each isotope differs from the others in its number of neutrons. |
| Compound | combinations of two or more elements |
| Ionic Bond | formed when ore or more electrons are transferred from one atom to another. |
| Ion | positively and negatively charged atoms |
| Covalent Bond | forms when electrons are shared between atoms. |
| Molecule | the smallest unit of most compounds |
| Vander der Waals forces | scientist who discovered intermolecualr forces of attraction |
| Cohesion | an attraction between molecules of the same substance |
| Mixture | a material composed of two or more elemtrs or compounds that are physically mixes together but not chemically combined |
| Solution | are evenly distributed throughout the solution |
| Solute | the substance that has dissolved |
| Solvent | the substance in which the solvent dissolves |
| Suspension | mixtures of water molecules keeps the small particles suspended |
| Ph Scale | indicate the concentration oh H+ ions in solution |
| Adhesion | an attraction between molecules of different substances. |
| Acid | any compound that forms H+ ions in solution. |
| Base | A compund that produces hydroxide ions in solution |
| Buffer | weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH. |
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