| Term | Definition |
|
period |
A row of elements in the periodic table whose properties change gradually and predictably. |
|
transition elements |
Elements in the middle of the periodic table, in groups 3-12. |
|
metal |
An element that has luster, is a good conductor of heat and electricity, is malleable, and is ductile. |
|
malleable |
The ability to be made into thin sheets. |
|
ductile |
The ability to be stretched into wires. |
|
nonmetals |
Elements which are not ductile, not malleable, do not have luster, and are poor conductors of electricity. |
|
metalloid |
An element that shares some characteristics of metals and some of nonmetals. |
|
alkali metals |
The name of the family of elements in Group 1. |
|
alkaline earth metals |
The name of the family of elements in Group 2. |
|
halogens |
The name of the family of elements in Group 17. |
|
noble gases |
The name of the family of elements in Group 18. |
|
the iron triad |
The name given to iron, cobalt, and nickel, collectively. |
|
rare earth elements |
The 'inner-most' elements, which are usually placed at the bottom of the periodic table. |
|
lanthanide series |
The 15 elements including and immediately following lanthanum. |
|
actinide series |
The 15 elements including and immediately following actinium. |
|
luster |
The ability to reflect light. |
| Add or remove terms from this set |