| Term | Definition |
|---|
| proton | positive charged particle in nucleus- is the atomic number |
| electromagnetic | magnetism produced by electricity- one of the four fundamental forces |
| chemistry | The branch of science that deals with the composition of a substances and the changes that it undergoes. |
| atomic | Of, or relating to atoms |
| catalyst | A substance which increases the rate of a chemical reaction without being consumed in the process. |
| radiology | the use of radiation (, especially X-rays) in diagnosis, usually through the formation of images |
| orbit | A circular or elliptical path of one object around another object. |
| permeable | material that absorbs or allows the passage of water |
| isotope | Any of two or more atoms of an element having the same number of protons, but a different number of neutrons in its nucleus. As a consequence, it will have the same atomic number but a different mass number (atomic weight). |
| physics | The branch of science concerned with the study of properties and interactions of space, time, matter and energy. |
| fission | The process whereby one item splits to become two. |
| complete | To make whole or entire. |
| pro | forward; favoring; |
| electro | electric; electricity |
| chem | referring to chemistry |
| atom | vapor |
| -lyst | dissolve; decompose |
| radi | ray; spoke of a wheel; |
| orb | ciecle; round; ring |
| per | through |
| iso- | equal; same |
| physi | nature; natural qualities |
| fis- | divided into; split |
| com | with; together |
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