Question

Higher Order Thinking Skills.

List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.

Answer 1

1. Metals and their uses in our houses & schools :

1. Magnesium is used in the laboratory as magnesium ribbon.
2. Copper is used cooking utensils.
3. Zinc is mainly used as a protective coat for iron is our school and house gates.
4. Aluminum is used as cooking utensils and electrical cables which are used in our schools and houses.
5. Iron and steel are widely used is construction of house and school.
6. Sodium is used as a table salt and for flavoring, preserving food.
7. Coins are made up of nickel.
8. Lead is used in car batteries. Lead based alloys find extensive use in printing

2. Non-metals and their uses in houses & school:

1. Oxygen is essential for the breathing. It is used as oxidising agent in laboratory. Chlorine is used for purifying water.
2. Graphite is used in pencil leads.
3. Carbon is used as a fuel.
4. Bromine is used in dyes.
5. Iodine is used in laboratory to test for starch.

3. Metalloids and their uses in houses & schools :

1. Silicon is used in glass items.
2. Antimony is used in optical discs.
3. Tellurium is used in solar cells.
4. Boron is used in washing powders.
5. Germanium is used to make transistors which is used in laboratory in electrical devices.

4. Comparsion of properties of metals, non-metals & metalloids

Metals	Non-metals	Metalloids
They have lustre	They are not lustrous	Intermediate
Conduct heat and electricity	Poor conductors of electricity except graphite	Intermediate (semi­conductors)
They are malleable and ductile	They are neither malleable nor ductile.	Intermediate