A glimpse to the world of carbon

1. CARBON
Presented by:
NIMNA .B
PHYSICAL SCIENCE
KUTEC, DHARMASALA

2. Basics:
Symbol C
Atomic number 6
Electronic configuration 2,4
No. of electrons in the
outermost shell
4
Valency 4
Metal/non-metal Non-metal

3. Allotropes of Carbon
 What are allotropes?
Allotropes are different forms of the same element having
different physical properties but same chemical properties
are known as allotropes.
 Crystalline allotropes of carbon:
 Diamond
 Graphite
 Fullerene
 Graphene

4. Diamond
 Characteristics
 Hardest allotrope of carbon
 Transparent
 High thermal conductivity
 High refractive index
 Not a conductor of electricity
 Uses
 Used to make ornaments
 Used for cutting glass

5. Crystal Structure of Diamond

6. Graphite
 Characteristics
 Softest crystalline allotrope of carbon
 Soft and slippery
 Grey in colour
 Conductor of electricity
 Non volatile
 Uses
 Used to make pencil lead
 Used to make electrodes of dry cells
 Used as a solid lubricant

7. Crystal Structure of Graphite

8. Amorphous Carbon
 Non crystalline allotropes are commonly called amorphous
crbon
 E.g.: Coke coal, charcoal, bone charcoal etc.

9. Carbondioxide (CO2)
 The main carbon compound present in the atmosphere
 The main compound formed during the combustion of
carbon and carbon compounds
 Preparation in laboratory
CaCO3 + 2HCl CaCl2 + H2O + CO2

10.  Properties
 Colourless
 Not a supporter of combustion
 Odourless (sharp acidic smell at high concentrations)
 Denser than air
 Aqueous solution of CO2 is acidic

11. CARBON CYCLE

12. THANK YOU