| A | B |
|---|
| Periodic Law | states when the elements are arranged by their atomic #'s, elements w/sim properties appear at regular intervals. |
| Valence Electrons | an electron found in outermost shell of atom & determines atom's chemical props. |
| Group | vertical column of elements in the p. table; elements in a group share properties. |
| Period | a horizontal row of elements in the p. table. |
| Main Group Element | an element in the s-block or p-block of the periodic table. |
| Alkali Metal | Group 1. Metals that react w/water to make alkaline solutions. |
| Alkaline Earth Metals | Group 2, highly reactive, usually found as compounds than pure elements. |
| Halogens | Group 17. Most reactive of nonmetals due to electron configuration. |
| Noble Gases | Unreactive element of Group 18. Most have full set of electron in outermost shell config. |
| Transition Metals | Groups 3-12 (d-block). 1 of the metals that can use inner shell B4 using outer shell to bond. |
| Lanthanides | member of rare-earth series, #'s 58-71. Shiny metals similar to alkaline earth metals. (TV's) |
| Actinides | any element in actinide series, #'s 89-103. Structures more import. then electron config. (Uranium) |
| Alloy | a solid or liquid of two or more metals. |
