| Question |
 |
|
| Answer |
|
|
| reactive |
likely to undergo a chemical change |
| metal |
an element that tends to be shiny, easily shaped, and a good conductor of electricity and heat |
| nonmetal |
an element that is not a metal and has properties generally opposite to those of a metal |
| metalloid |
an element that has properties of both metals and nonmetals |
| radioactivity |
the process by which the nucleus of an atom of an element releases energy and particles |
| half-life |
the length of time it takes for half of the atoms in a sample of a radioactive element to decay into atoms of another element |
Spanish 3
