Online notes for 9th class science - Is Matter Around Us Pure In ths article, we have discussed the 'Non Metals'. Non Metals : A non-metal is an element that is neither malleable /ductile and they are not good conductors of electricity. Eg: – Krypton, xenon, diamond, graphite etc. They are the allotropic forms of carbon. All the nonmetals are solids or gases, except bromine which is a liquid non-metal at room temperature. Non Metals are not lustrous- Nonmetals do not have a shiny They have a dull appearance. Iodine is a nonmetal having a lustrous appearance. It has a shiny surface as metals have. Non –Metals are generally soft – Most of the nonmetals are soft they can easily be cut with a knife. Carbon is the only nonmetal which is hard. Diamond is the exception which is extremely hard natural substance. Non Metals are not strong- Nonmetals cannot hold large weights. They have very low tensile strength. Non metals are not malleable, they are brittle- Non metal
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