In Class IX you have learnt about various elements. You have seen that elements can be classified as metals or non-metals on the basis of their properties.
Think of some uses of metals and non-metals in your daily life.
What properties did you think of while categorising elements as metals or non-metals?
How are these properties related to the uses of these elements?
Let us look at some of these properties in detail.
Trends in the Modern Periodic Table Valency : As you know, the valency of an element is determined by the number of valence electrons present in the termost shell of its atom. Activity 5.6 How do you calculate the valency of an element from its electronic configuration? What is the…
Enrichment of Ores Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc., called gangue. The impurities must be removed from the ore prior to the extraction of the metal. The processes used for removing the gangue from the ore are based…