Metal property

 CHEMISTR IS MATTER AROUND US PURE Properties of Non-Metals The physical properties of non-metals are just the opposite of the physical properties of metals. The 47 important physical properties of non-metals are given below : 1. Non-Metals are Not-Malleable. Nen-Metals are Brittle. This means that non-metals cannot be beaten and phosphorus are solid non-metals which are not malleable, they cannot be beaten into thin sheets with into thin sheets with a hammer. Non-metals break into small pieces when hammered. For example, sulphur a hammer. Thus, we cannot get thin sheets from non-metals. Sulphur and phosphorus non-metals are brittle. When beaten with a hammer, they break into small pieces. Brittleness is a characteristic property 2. Non-Metals are Not Ductile. This means that non-metals cannot be drawn into wires. They are easily snapped on stretching. For example, sulphur and phosphorus are non-metals and they are not ductile. When stretched, sulphur and phosphorus break into pieces and do not form wires. Thus, we cannot get wires from non-metals. From the above discussion we conclude that : Nón-metals are neither malleable nor of solid non-metals. Rlan-Metals are Bad Cenductors of Heat and Electricity This means that non- do net allow heat and electricity to pass ttrough them. For example, sulphur neaoenhorus are non-metals which do not conduct heat or electricity. Many of the ductile. Non-metals are brittle. y impona times m metals p 1o steel m non-metals are, a redds Non-Metals are Not Lustrous (Not Shiny). They are Dull in Appearance. Non- electrode in the middle metals do not have lustre (chamak) which means that non-metals do not have ashining of graphite because it is urface. The solid non-metals have a dull appearance. For example, sulphur and a good conductor nf Figure 13. The black njra), an of this dry cell is made surface. They appear to be dull. There is, however, an exception. Iodine is a non- metal having lustrous appearance./It has a shining surface (like that of metals). Non-Metals are Generally Sdft (except diamond which is extremely hard non-metal). Most of the solid non-metals are quite soft. They can be easily cut with a knife. For example, sulphur and phosphorus T mist phosphorus are non-metals which have no lustre, that is, they do not have a shining electricity. unendi Nitr are solid non-metals which are quite soft and can be easily cut with a knife. Only one non-metal carbon (in a Gapb the form of diamond) is very hard. In fact, diamond (which is an allotropic form of carbon) is the hardest natural substance known. 6.Non-Metals are Not Strong. They Have Low Tensile Strength. This means that non-metals cannot ld large weights (without breaking). For example, graphite is a non-metal which is not strong. It has a Iow tensile strength. When a large weight is placed on a graphite sheet, it breaks. KANON-Metals may be Solid, Liquid or Gases at the Room Temperature. Non-metals can exist in all nmnysical states solid, liquid and gaseous. For example, carbon, sulphur and phosphorus are solla on-metals. electric non-metals; bromine is a liquid non-metal; whereas hydrogen, oxygen, nitrogen and chlorine are gaseous 8. Nan-Metals Have Comparatively Low Melting Points and Boiling Poirfts (except graphite which is a non-metal having a very high melting point). This means that non-metals melt and vaporise at comparatively low temperatures. For example, sulphur is a non-metal having a low melting point of 119°C. Only one non-metal graphite has a very high melting point (of 3700°C). The majority of non-metals have Very low boiling points due to which they exist as gases at room temperature.