| A | B |
|---|
| solid | definite shape and definite volume |
| solution | another name for a homogeneous mixture with particles so small they |
| solvent | a liquid used to dissolve other substances |
| states of matter | the three forms in which matter exists |
| chemical change | change of one substance to another substance |
| chemical property | characteristic of a substance that indicates whether it can undergo a |
| density | mass per unit of volume of a material |
| gas | substance that fills space available, no definite volume or shape |
| liquid | substance with a definite volume and mass, but no definite shape |
| matter | anything that has both mass and volume |
| physical change | a change in size, shape, or state of matter |
| physical property | such characteristic of a material that you can observe without changing the substances |
| solute | the substance that is dissolved to form a solution |
| flammable | easily set on fire |
| atom | The basic particle from which all elements are made. |
| electron | A negatively charged particle that is formed outside the nucleus of an atom. |
| nucleus | The central core of the atom. |
| proton | A positively charged particle that is part of an atom's nucleus. |
| energy level | The specific amount of energy an electron has. |
| neutrons | The small particles in the nucleus of the atom, with no electrical charge. |
| atomic mass | The average mass of all of the isotopes (two or more forms of an element)of an element. |
| isotopes | Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons. |
| mass number | The sum of protons and neutrons in the nucleus of the atom. |
| atomic number | The number of protons in the nucleus of an atom. |
| periodic table | A chart of the elements showing the repeating pattern of their properties. |
| period | A horizontal row of elements in the periodic table. |
| group | Elements in the same vertical column of the periodic table; also called a family. |
| chemical symbol | The one- or two- letter representation of an element. |
