Elements can be divided into metals and nonmetals and it is important to know whether a particular element is a metal or nonmetal.Metals (like copper and aluminium) are good conductors of heat and electricity, while nonmetals (such as phosphorus and sulfur) are insulators. Soft and Brittle: The solid non-metals are soft and brittle such as graphite, sulphur and iodine. Poor Conductors of heat and electricity, dull, Brittle solids, Most are gases at room temperature, Low density, Low melting point, Not malleable, Not ductile. The metalloids, or semimetals, have properties that are somewhat of a cross between metals and nonmetals. A nonmetal is an element that is generally a poor conductor of heat and electricity. Physical Properties of nonmetals: Physical State: Most of the non-metals exist in two of the three states of matter at room temperature: gases (oxygen) and solids (carbon). Only diamond, a form of carbon is hard. Some nonmetals are very reactive, whereas others are not reactive at all. Materials are distinguished as above, … Like to react with metals, Gain valence electrons to form ions when bonding. Non-Metal dopants are carbon, nitrogen, fluorine, sulphur and iodine. Non-metals are also called electronegative elements because the non-metal atom form negatively charged ion by accepting electrons. In fact, diamond is the hardest substance. The atoms of non-metals tend to be smaller than those of metals. Among the non-metals, the anionic dopants have a strong influence on the VB. 3. In the chemical world, these “spare parts” would be considered non-metals, loosely defined as not having the properties of metals. Copper is used in making electric wires, gold is used to make jewellery, stainless steel is used to make pots, pans, etc . ; Conduction: They are poor conductors of heat and electricity. The following are the general properties of non-metals. Physical Properties of Metals. Metals and Nonmetals are different types of materials present around us. Chemical Properties of nonmetals. Most of the non-metals are non-lustrous and dull such as sulphur, phosphorus. All non-metals react with oxygen to form acidic or neutral oxides. Non metals have properties opposite those of the metals . Only bromine exists as a liquid at room temperature. The metalloids, or semimetals, have properties that are somewhat of a cross between metals and nonmetals. Physical State: Most of the non-metals exist in two of the three states of matter at room temperature: gases (oxygen) and solids (carbon). It depends on the number of electrons in their outer energy level. Nonmetals are also poor conductors of heat, and solid nonmetals are dull and brittle. Most properties of nonmetals are the opposite of metals. Non metals have properties opposite those of the metals . The following are the physical properties of metal : The physical properties make them useful for many purposes. 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