Nonmetal
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In the context of the periodic table, a nonmetal is a chemical element that mostly lacks distinctive metallic properties. Physically, nonmetals range from colorless gases such as hydrogen to lustrous
![Arsenic (here sealed in a container to prevent tarnishing) is sometimes counted as a nonmetal.[citation needed] Although it has a lustrous appearance](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Arsen_1a.jpg/500px-Arsen_1a.jpg)
Arsenic (here sealed in a container to prevent tarnishing) is sometimes counted as a nonmetal.[citation needed] Although it has a lustrous appearance and is a reasonable conductor of heat and electricity, it is brittle, and its oxides show appreciable acidic character. Its chemistry is predominantly nonmetallic.
Boron appears metallic
Carbon appears metallic
Oxygen when liquified turns pale blue
Metal
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A metal is a material that, when polished or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. These properties are all associated with having electrons availa
Nonmetal
…In the context of the periodic table, a nonmetal is a chemical element that mostly lacks distinctive metallic properties. Physically, nonmetals range from colorless gases such as hydrogen to lustrous crystalline solids such as iodine. They are usually less dense…
Iron, shown here as fragments and a 1 cm3 cube, is an example of a chemical element that is a metal.
Metal in the form of a gravy boat made from stainless steel, an alloy largely composed of iron, chromium and nickel
Gallium crystals
Battery demonstration unit for conducting polymers built by nobel laureate Alan MacDiarmid