| A | B |
|---|
| atom | smallest part of an element that still shows the properties of the element |
| atomic number | number of protons in an element |
| acid | releases hydrogen ions when dissolved in water |
| molecular formula | shows the kinds and ratios of atoms in a compound |
| neutralization | reaction that occurs when equal strength acids and bases are mixed in equal volumes |
| covalent bond | bond is formed when atoms share electrons |
| element | substance composed of only one type of atom |
| ion | a charged atom |
| isotope | atoms of the same element that have different atomic masses |
| nonpolar covalent bond | bond formed when atoms share electrons equally |
| ph | measures the concentration of hydrogen ions in a solution |
| reactants | substances that participate in a chemical reaction |
| hydrogen bond | bond formed by polar molecules attraction |
| mass number | sum total of protons and neutrons in an atom |
| hydrophobic | with no affinity for water - it will not mix |
| atomic nucleus | contains the protons and neutrons |
| atomic symbol | one or two letter abbreviations used to represent element |
| base | substance that releases hydroxide ions when dissolved in water |
| compound | sunstance composed of two or more different kinds of elements |
| electron | negative particle found in an atom |
| ionic bond | bond is formed by the transfer of electrons |
| neutron | neutral particle in an atom |
| proton | positive particle in an atom |
| molecular formula | used to represent the types and ratios of atoms found in a substance |
| molecule | smallest part of a compound that still retains the properties of a compound |
| polar covalent bond | bond is formed when electrons are shared unequally |
| products | the materials that are formed by a chemical reaction |
| hydrophillic | substance that can mix with and dissolve in water |
| density | explains why ice floats |
| four | number of bonds H2O moleculse form in ice |
| cation | a positive ion |
| anion | a negative ion |
| iron | binds oxygen in hemoglobin |
| sulfur | reactant for chemosynthetic bacteria |
| phosphorus | in cell membranes, DNA, and ATP |
| calcium | needed for bones and exoskeletons |
| surface tension | measure of how difficult it is to break the surface of a liquid |
| aqueous | a solution in which water is the solvent |
| nitrogen | used in the production of amino acids and chlorophyll |
| oxygen | essential for cellular respiration |
| molarity | no. of moles of solute per liter of solution |
| buffer | a solution that resists changes in pH |
| carbonic acid carbonate system | important blood buffer |
| heat of vaporization | explains the cooling effect of sweating |
| specific heat | explains waters stable temperature |
