A | B |
physical property | a property that can be observed without changing what a substance is made of |
physical change | a change in a substance's appearance but not in what it is made of |
chemical property | a property that describes how a substance reacts with other substances |
chemical change | a change that forms new substances with new properties |
element | one of the 109 basic substances of matter |
nucleus | the central part of an atom |
electron | a negatively charged atomic particle |
neutron | a particle with no charge found in the nucleus of an atom |
proton | a positively charged particle in the nucleus of an atom |
conductor | a material that transmits heat or electricity |
periodic table | arrangement of all known elements in a chart in order of the number of protons each element has |
formula | a way to write the kinds and numbers of atoms in a molecule or compound |
symbol | one or two letters that stand for the name of an element |
solution | a mixture of molecules made by dissolving one substance in another substance |
solvent | a substance that dissolves a solute |
solute | a substance that dissolves another substance |
dilute | containing a small amount of solute |
concentrated | containing a large amount of solute |
suspension | a mixture in which patricles of a substance are scattered in another substance but not dissolved |