The document discusses the properties of elements in each group of the periodic table. Elements in the same group have similar properties because they have the same number of electrons in their outer shell. Group 1 elements are alkali metals that are soft, reactive metals with one outer electron. Group 2 elements are alkaline-earth metals that are also reactive metals, but less so than Group 1, with two outer electrons. Transition metals in Groups 3-12 vary widely in properties but are generally shinier and better conductors than Groups 2 and below. Other groups discussed include metalloids, nonmetals, and noble gases.

1. Grouping the ElementsChapter 5.2

2. Objectives:Explain why elements in a group often have similar properties.Describe the properties of the elements in the groups of the periodic table.

3. Group 1: Alkali MetalsAlkali metals are elements in Group 1 of the periodic table. Alkali metal properties:

4. group contains metals

5. 1 electron in the outer level

6. very reactive

7. softness

8. color of silver

9. shininess

10. low densityGroup 2: Alkaline-Earth MetalsAlkaline-earth metals are elements in Group 2.

11. Alkaline-earth metal properties:

12. group contains metals

13. 2 electrons in the outer level

14. very reactive, but less reactive than alkali metals