term "metal" all to yourself somehow represent.Iron, silver, gold, copper and lead.These names are found in the news constantly, so few people will ask the question of what metals.Yet it would not hurt to know that such metals from the standpoint of the chemist and physicist, if you want to keep in mind the system picture of the world.And to complete the knowledge on this subject would do well to learn about other groups - non-metals and metalloids.What is the metal and non-metallic properties?
If memory summed
Non-metals seem more mysterious, especially for those who do not remember high-school chemistry, so concentrate on the properties of non-metallic and metallic, respectively, should be considered the opposite.The fact that you do not remember, there's no shame, the human brain is hard to keep in the mind the information that does not need every day.So, we list the properties of metallic and comment on them, to make it more understandable.
no heat, no electricity
worse metals Non-metals conduct electricity and heat.Therefore, ceramic mug, firstly, holds heat better than steel, and secondly, the likelihood of burn your hands on a cup is much less than on the soldier's iron mug.And remember, safety pull off from the power supply of the affected person can not with metal objects.But the tree you can use, carbon in wood - nonmetal.Property - metal conduct electricity well, non-metallic properties include low conductivity.
Fragility or plasticity
pure substances from non-metals are usually fragile or even often in the solid state are in the form of powder.Metals malleable, may take under the influence of temperature instruments and most unusual frozen form (use this quality in foundry).Non-metals are not so treated.Nonmetals often, even if they occur in the form of pieces, still have a low density and often seemingly porous.
table as a map of the area
If you "go" on the periodic table from left to right, you will notice that the non-metallic properties are enhanced left.Helium - the largest "Excellent non-metals."But if you go down the table, the metallic properties of fading.Metals also becoming more aggressive as you descend down the periodic table.Thus, the periodic table can be roughly assumed properties of simple substances consisting of atoms of particular elements.Substances "in the middle" called metalloid and is often used in electrical engineering as semiconductors.
Use nonmetal
general scope for all non-metals do not.Each has its own "specialization", as non-metallic materials - different.Inert gases are used for outdoor advertising, selenium - for toners in the printing industry, sulfur is in the match.We constantly encounter in everyday life with the materials which consist of derivatives of nonmetals.
Thus, the non-metallic properties as the metal can be predicted on the periodic table.And these laws are very interesting, because the table stores are still many undiscovered secrets that allow scientists to look far into the past, and perhaps in the future.Particularly interesting future metalloid.
