| A | B |
|---|
| subscript in a formula | tells how many atoms of an element are present in one molecule of an substance |
| coefficient | a number written in front of a chemical for to indicate the # of molecules present |
| atomic mass unit | 1/12 the mass of an atom of carbon -12 |
| aolloy | solid solution or more metals |
| isotopes | atoms of the same element that differ only in the number of neutrons in the nucleus |
| principal quantum number | the number given to an enerygy level in the atom |
| colloid | homogeneous mixture with too big to be considered true solution |
| sollutions | a homogeneus mixture in which ane substance is dissolve in an attom |
| amorphus soleds | a solid - like material that does not keep a definite shape |
| crystaline soled | a solid that does not alow and is composed odf particles in a regular repeating pattern |
| physical property | properties that can be abserved and measure without changing the kind of matter being studied |
| chemical propert | the properties that decribe how a substance change into other new substances |
| particle model for matter | all matter is made up of tiny moving particles |
