| A | B |
|---|
| atom | the smallest particle of an element that still has all the properties of that element. |
| chemical property | characteristics of an element or compound that determine how it will react with other elements or compounds. |
| compound | a substance containing two or more chemically combined elements and having properties different from those elements it contains |
| density | how tightly packed a substances milecules are: expressed as the mass of an object divided by its volume in grams per cubic centimeter |
| electron | one of the three sub-atomic particles in an atom: orbit the atom's nucleus and has a negative charge |
| element | a substance that contains only one kind of atom; cannot be broken down into simpler substances |
| ion | an atom with an electric charge |
| isotope | atoms of the same element that have the same number of protons, but different numbers of neutrons |
| matter | anything that has mass and takes up space |
| mixture | a combination of diffrrerent substances that keep their own physical and chemical properties despite being mixed. |
| molecule | the smallest particle of a compound that still keeps all the properties of the compound, is made up of like atoms |
| neutron | one of the two particles that make up the nucleus of an atom, it has no electric charge |
| physical property | characteristics of an element of compound that affect weight, clor, density, and such, but dont affect how it will react wtih other elements or compounds |
| proton | one of the two particles that make up the nucleus of an atom, it has a positive electrical charge |
| super conductor | a material that allows electricity to pass through it without resistance (the atoms bumbping into one another) |
