notes of ch metal and non metal of class 10
Answers
Answer:
notes of chapter metal and nonmetal of class 10th r
Explanation:
at present about 118 elements are known . elements can be divided into two main groups metal and nonmetal . elements which form positive ions by losing electrons are called metals . metals are lustre ductile malleable and good conductor of heat and electricity . they are solid at room temperature accept Mercury which is liquid . almost all the metals combine with oxygen to form metal oxide that are basic in nature except Aluminium oxide and zinc oxide which are atmospheric in nature . metallic oxides are insoluble in water but some of them dissolve in water to form hydroxides known as . metals react with water and produce a metal hydroxide and hydrogen gas . except few less reactive metal such as Si u s g b a u t t e t c all metals react with dilute sulphuric acid hydrochloric acid to produce salt and hydrogen . aquilegia is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3 ratio . reactive metal can displace a comparatively less reactive metal from its compound in aqua solution or in molten form . metal AVN hydrogen in the reactivity series can displace hydrogen from dilute . hydrogen also have non metallic properties but due to its electropositive nature It has been placed in the reactivity series . non metal are those which form ions by giving electrons . non metals do not react with water or steam to evolve hydrogen gas . then metal do not react with dilute acid to release hydrogen gas that react with hydrogen to form hydrides . ionic compound like sodium chloride do not exit as discrete molecules but indeed they are the aggregate of oppositely charged particles . the element or compound which Orchid naturally in the earth crust are known as minerals . minerals from which metals can be extracted profitably are called as ores. removal of unwanted materials from the ore is called enrichment of concentration of ore . the process of purification of metal obtained after reduction is called refining of metal . corrosion is a slow process of eating away of metals by the reaction of atmospheric air and moisture . rusting of iron is prevented by galvanizing by meeting alloy,painting,greasing aur Island and Tin plating and chromium plating . and Alloys is a homogenous mixture of two or more metals or nonmetals . please if you like ok this summary please like ok me and click on thanks button thank you