Tour of the Periodic Table

By: Kara Schmidt

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Alkali Metals

Alkali Metals are very reactive metals that do not occur freely in nature. The alkali metals are malleable, ductile, and are good conductors of heat and electricity. The alkali metals are softer than most metals. Cesium and francium are the most reactive elements in this group also Alkali metals can explode if they are exposed to water.
Reaction (Explosion) of Alkali Metals with Water

Alkaline (Rare) Earth metals

The alkaline earth elements are metallic elements. All alkaline earth elements have an oxidation number of +2, making them very reactive. Because of their reactivity, the alkaline metals are not found free in nature.

Examples of elements in this group are:
Beryllium, Magnesium, Calcium, Strontium, Barium, Radium

Halogens

There is 5 non-metallic elements The term "halogen" means "salt-former" and compounds containing halogens are called "salts". All halogens have 7 electrons in their outer shells, giving them an oxidation number of -1. The halogens exist, at room temperature, in all three states of matter:

Examples of Halogens:

Fluorine
Chlorine
Bromine
Iodine
Astatine