| A | B |
|---|
| Stairstep | divides the metals from the nonmetals |
| Hydrogen | The element that does not seem to belong in Group 1 |
| Non reactive group of elements | Noble Gases |
| Group 17 | Halogens |
| Group 1 | Alkali Metals |
| 7 | There are _____ periods on the periodic table. |
| Groups | Columns on the periodic table. |
| Atomic number | identifies an element. |
| The "valley" of the periodic table. | Transition elements |
| Br and Hg | Only liquid elements at room temperature. |
| Hard and conduct electricity | Metals |
| Liquids and dull solids | Nonmetals |
| Boron | Metalloid |
| Elements number 93 and higher | Man-made or synthetic. |
| 18 | the number or groups or families on a periodic table. |
