Question 1 What are metalloids.Give example?
Question 2 Write few characteristics of metals?
Question 3 write few characteristics of non-metals?
Question 4 Give examples of metals?
Question 5 Give examples of non-metals?
Question 6 How many metals are known to us?
Question 7 How many non-metals are known to us?
Characteristics of metals
1)Metals are malleable.
2)Metals are ductile.
3)They are good conductor of heat and electricity.
4)They are lustrous or shiny.
4)They are hard and strong.
5)They cannot be cut easily.
6)They are solids except mercury which is a liquid.
7)They have high melting and boiling point.
8)They have high densities.
9)They are sonorous.
For Example: Iron, copper, aluminium, zinc, gold, silver, sodium, potassium, nickel, cobalt, tin, ,mercury etc
There are 70 metals.
Characteristics of Non-metals
1)Non-Metals are not malleable.
2)Non-Metals are not ductile.
3)They are bad conductor of heat and electricity.
4)They are not lustrous or shiny.
4)They are not hard and strong.
5)They can be cut easily.
6)They are solids, liquid and gases at room temperature.
7)They have low melting and boiling point.
8)They have low densities.
9)They are not sonorous.
For Ex:Carbon,sulphur,helium,hydrogen,phosphorus,fluorine,chlorine etc.
There are 22 non-metals.Out of these 10 are solids,1 non-metal is a liquid whereas 11 non-metals are gases.
The elements whose properties are intermediate between those of metals and non-metals are known as metalloids.