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Chapter 1
Introduction to chemistry
Dr Richard Malik
The Stories of Two Chemicals
Ozone is formed when oxygen gas is
exposed to ultraviolet radiation in the
stratosphere forming an ozone layer
Ultraviolet radiation(UV)is harmful to
plants and animals
mportance of the ozone layer
Ozone absorbs most of the harmful
UV radiation before it reaches earths
surface
The Stories of Two Chemicals
Chlorofluorocarbons(CFC)
Used as coolant for refrigerators
Used as propellants in spray cans
What is Chemistry?
Chemistry is the study of the matter, its
composition, properties, and the
Which Comes first?
Pure Chemistry
Usually comes first
applied later
Called technology
5
Mass and matter
Matter is anything that has mass and takes
up space(EX Book)
r Mass
6
Branches of Chemistry
Analytical Chemistry -studies composition of
7
Applied Chemistry
Material Design
Plastics
Paints
Nanotechnology
8
Applied Chemistry
y Agriculture
Production- fertilizers. soil tests
Protection
9
Scientific method
r A way of solving problems or answering
questions
Step 1: Observation