| Question | Answer |
|---|---|
| matter | anythingthat has mass and occupies space. |
| element | a subforce composed of a single kind of atom that cannot be broken down into other substances by chemecal physical means. |
| periodic table | an organized table of all the known elements. |
| atomic number | the number of protons or electrons in an element. |
| atomic symbol | an abreveation for the element name. |
| atomic mass | the mass of the protons and neutrons (also known as the atomic weight). |
| compound | a substance in which two or more elements are chemicaly joined in a set ratio. |
| mixture | two or more substances that are mixed together but not chemicaly combined. |
| atom | the smallest unit of an element that retains properties of that element. |
| nucleus | the central core of an atom that contains the protons and nuetrons. |
| protons | small,positively charged partical in the nucleus of an atom. |
| nuetron | uncharged particals in the nucleus of an atom. |
| electron | a tiny negitevly charged high energy partical that moves in the space around the nucleus of an atom. |
| electron shells | fixed orbits or paths that electrons travle in around the nucleus. |
| molecule | two or more atoms that are bonded together |
| chemical bond | the force that holds two or more atoms together |
