Hello students, hi welcome with this course
An Introduction to Chemistry.
All the objects around you-books, your pen or pencil,
and the things of nature such as rocks, water, plant and animal substances-form the matter of the universe.
Each of the particular kind of matter, such as a certain kind of paper, plastic or metal, is referred to as a materiel.
We can define Chemistry as the science of the composition and structure of materials
and of the change that materials undergo.
Chemistry may hope that by understanding certain materials,
he or she will be able to find a cure for disease or a solution for an environmental ill
For thousand of years, human beings have fashioned natural materials into useful products
Modern Chemistry certainly has its roots in this attempt
After discovery of fire, people began to notice changes in certain rocks and minerals exposed to high temperatures.
From these observations came
the development of ceramic, glass,and metals,
which today are among our most useful materiel
Dyes and medicines were other early products obtained
from natural substances.
Chemistry as a field of study based on scientific principle
came into being only in the later part of eighteenth century.
Chemists began to look at the precise quantities
of substances they use in their experiments.
From this work came the central principle
of modern Chemistry:
the materials around us are composed of exceedingly small particles called atoms.
The precise arrangement of these atoms
into molecules or more complicated structures accounts
for the many different characteristics of materials.
Once chemists understood this central principle
they could begin to fashion molecules to order
They could synthesise molecules; that is they could
build large molecules from small ones
Chemists continue to develop new materials and to discover new properties of old ones.
Electronics and communication,for examples,have been completely transformed by technological advances in materials.
One applications of Chemistry is optical fibre which are cables have replaced
long distance telephone cables made of copper wire
Optical fibres are fine threads of extreme pure glass
Because of their purity,these fibres can transmit
laser light pulses for miles compared with only a few inches in ordinary glass.
Chemistry:A science for the 21st Century Some application of Chemistry we can say
Health and Medicine
Chemical reaction and Drugs synthesis
Chemistry is important in medicine because most disease, injuries and treatments
involves chemistry and chemical processes
By understanding Chemistry we are able to develop drugs that fight disease
Develop better nutrition and develop healthier environments to avoid disease
Energy and environment, fuels solar and nuclear energy
Chemistry of course help us to cope with increasing pressure on energy
Food, water and other scary natural resources and to live more sustainably
Also, Materials and Technology
Polymer, ceramics, liquid crystals
molecular Computing also
one filed of applications of Food chemistry, computational chemistry is a branch of chemistry
that uses computer simulation to assists in solving chemical problems
also we can say from applications we find crops, Natural pesticides and Specialized fertilizers
if we look In macro scale we deal with normal weights such as kilograms and grams
While in micro scale so before macro scale now micro scale in chemistry we deal with atoms and molecules scale
Thank you student see you in the next video.