Metals

The chemical properties of metals：
Metals can be easily oxidized. Oxidation is informally known as the process of corrosion. Metals can also react with acid in a single displacement reaction to make hydrogen gas and an aqueous solution of a salt. Some metals, like sodium or calcium will react with water to make a base
The physical properties of metals can be easily explained in terms of this "electron sea" model of metallic bonding. Characteristic physical properties of metals include:
－ Metals are ductile (they can be drawn into wires) and metals are malleable (they can be pounded into thin sheets)
－Metals have relatively high melting points and remain in the liquid state over a wide temperature range. 　
　　 －Metals have varying degrees of hardness.
－Metals conduct electricity and heat.　
　　　　－Metals are usually shiny. They have luster.　
　　　　The alkali metals, found in group 1 of the periodic table (formerly known as group IA), are very reactive metals that do not occur freely in nature. These metals have only one electron in their outer shell. Therefore, they are ready to lose that one electron in ionic bonding with other elements. As with all metals, the alkali metals are malleable, ductile, and are good conductors of heat and electricity. The alkali metals are softer than most other metals. Cesium and francium are the most reactive elements in this group. Alkali metals can explode if they are exposed to water. 　
　　　　The Alkali Metals are：　
　　　 Lithium Sodium
Potassium Rubidium
Cesium Francium
The alkaline earth elements are metallic elements found in the second group of the periodic table. 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.
The Alkaline Earth Metals are：
Beryllium Magnesium
Calcium Strontium
Barium Radium
The 38 elements in groups 3 through 12 of the periodic table are called "transition metals". As with all metals, the transition elements are both ductile and malleable, and conduct electricity and heat. The interesting thing about transition metals is that their valence electrons, or the electrons they use to combine with other elements, are present in more than one shell. This is the reason why they often exhibit several common oxidation states. There are three noteworthy elements in the transition metals family. These elements are iron, cobalt, and nickel, and they are the only elements known to produce a magnetic field.
Some Transition Metals are：
Scandium Titanium Hafnium
Gold Zinc Osmium
Chromium Mercury Platinum
Cobalt Nickel Cadmium