METALS AND NON METAL

METAL AND NON METALS # ELEMENT Definition An element is a pure substance which is made up of same kind of atom which differs from their physical and chemical properties.  117 elements are known under which 92 are naturally occurring. Classification of... More

METAL AND NON METALS # ELEMENT Definition An element is a pure substance which is made up of same kind of atom which differs from their physical and chemical properties.  117 elements are known under which 92 are naturally occurring. Classification of elements  Elements can be classified into 3 types • Metals • Non metals • Metalloids CLASSIFICATION OF ELEMENTS METALS NON METALSMETALLOIDS COMBINED STATEFREE STATE GOLD SILVER PLATINUM NA, K, Ca in the form of catbonate , oxides, sulphide silicon, germanium, arsenic COMBINED STATE FREE STATE Oxygen, Nitrogen, sulphur, Carbon in the form of graphite, diamond. Sulphur and carbon in the form of oxides, carbonates , sulphides  Some abundant elements • Aluminium(most) • Iron  Most abundant non metal • Oxygen  Less reactive metal • Gold • Silver • Platinum  Most reactive metals • Sodium • Potassium • Calcium Less