| Mole | 6.022 X 10^23 representative particles of a substance |
| alpha radiation | consists of helium nuclei that have been emitted from a radioactive source, |
| atom | smallest particle of an element that retains the properties of that element |
| atomic number | the number of protons iin the nucleus of an atom represented by the letter Z |
| catalyst | a substance that speeds up a reaction without being used up |
| half life | the time requred for one half of the atons of a radioisotope to emit radiation and to decay to products |
| matter | takes up space |
| nuclear reaction | a process that alters the energy or structure or composition of atomic nuclei |
Drag corresponding items onto each other to make them disappear.
Start Game