| Question |
 |
|
| Answer |
|
|
| alkali metals |
Group 1 (IA) elements that each have one valence electron. |
| alkaline-earth metals |
Group 2 (IIA) elements that each have two valence electrons. |
| alloys |
A homogeneous mixture of metals. |
| ductile |
Capable of being drawn into wire. |
| electron configuration |
The number and position of electrons in the energy levels of an atom. |
| family |
A vertical column on the periodic table; also called a group. |
| group |
Another name for a family on the periodic table. |
| halogens |
Reactive elements in Group 17 (VIIA) that have seven valence electrons. |
| luster |
Capable of reflecting light. |
| malleable |
Capable of being hammered or rolled. |
| metals |
An element that tends to give up electrons in a chemical reaction. |
| metalloids |
A substance that has properties of both metals and nonmetals. |
| noble gases |
Stable elements found in Group 18 (VIIIA) that have eight valence electrons. |
| nonmetals |
An element that tends to gain electrons in a chemical reaction; poor conductor of heat and electricity. |
| periods |
A horizontal row in the periodic table, also called a series. |
| periodic law |
The chemical properties of the elements are periodic functions of their atomic numbers. |
| periodic table |
A table of the elements arranged by atomic number into vertical columns called families or groups, and horizontal rows called periods. |
| series |
Another name for a period in the periodic table. |
| transition elements |
Strong metals in Groups 3-12 (IB through VIIIB). |
| transuranium elements |
An element with an atomic number higher than that of uranium. |
| valence electrons |
The electrons in the outermost energy level of an atom. |
Ch.18 LTI-MA 509
