| A | B |
|---|
| element | matter with atoms of one one kind. |
| anode | an electrode with a positive charge |
| cathode | an electrode with a negative charge |
| electron | a negatively-charged particle that exists in a cloud formation around an atom's nucleus. |
| alpha particles | Consist of 2 protons and 2 neutrons |
| proton | positively charged particle present in the nucleus of all atoms. |
| neutron | an electrically neutral particle that is found in the nucleus of an atom. |
| electron cloud | the region surrounding nucleus where electrons travel. |
| atomic number | the number of protons in the nucleus of an atom |
| isotope | are toms of the same element that have different numbers of neutrons |
| mass number | the number of neutrons plus the number of protons |
| radioactive decay | the release of nuclear particles and energy is called radioactive decay |
| transmutation | the changing of one element into antoher trough radioactive decay is called transmutation |
| beta particle | a high energy electron that comes from the nucleus and not the electron cloud |
| half-life | the amount of time that it takes for a radioactive isotope to |
