Transcription of CHAPTER3 Metals and Non-metals - NCERT
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CHAPTER3 Metals and Non-metals - NCERT
Metals and Non-metals3 CHAPTERIn Class IX you have learnt about various elements. You have seenthat elements can be classified as Metals or non- Metals on the basis oftheir of some uses of Metals and non- Metals in your daily properties did you think of while categorising elementsas Metals or non- Metals ?nHow are these properties related to the uses of these elements?Let us look at some of these properties in PHYSICAL PROPERTIESAL PROPERTIESAL PROPERTIESAL PROPERTIESAL MetalsThe easiest way to start grouping substances is by comparing theirphysical properties. Let us study this with the help of the followingactivities.
oxides, such as aluminium oxide, zinc oxide show both acidic as well as basic behaviour . Such metal oxides which r eact with both acids as well as bases to produce salts and water are known as amphoteric oxides. Aluminium oxide reacts in the following manner with acids and bases – Al 2 O 3 + 6HCl → 2AlCl 3 + 3H 2 O Al 2 O 3 + 2NaOH ...
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