Metals and non metals
Metal and Non-metals of Class 8
ABOUT METALS AND NON METALS
At present, more than 114 chemical elements are known. Many of them are found to occur in nature whereas some of them have been made by artificial methods and are called synthetic elements.
Each element has a set of characteristic properties. To make the study of these elements easier, they are grouped on the basis of their common properties into two classes––metals and non-metals.
Different metals and non-metals have different physical and chemical properties. Therefore, they are used also in a different manner.
We will read about this in detail in the following chapter.
ELEMENT
An element is a pure substance which cannot be subdivided into two or more new substances by any means. Chemists have found 114 elements which exits in nature. Example: Silver, Iron, Oxygen, Nitrogen, etc
- Introduction
- Metals and non metals
- Classification of elements
- Electropositive or electronegative nature of elements
- Occurrence of metals and non-metals
- Occurance of metals
- Occurance of non-metals
- Physical properties of metals
- Non-metals and their general properties
- Chemical properties of metals
- Reactivity Series of Metals
- Chemical properties of non-metals
- Electron redistribution in chemical bonds
- Uses of some common metals
- Uses of some common non metals
- Corrosion of metals
- Metalloids
- Alloys
- Metallurgy
- Uses of metals and non metals
- Solved questions
- Exercise 1
- Exercise 2
- Exercise 3
- Exercise 4
