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BERSELIUS.
BERSELIUS DISCOVERED THE ELEMENTS SELENIUM, THORIUM CERIUMAND SILICON. THE KING OF SWEDEN HONOURED HIM WITH THE TITLE OF BARON.
HIS TEXT BOOK OF CHEMISTRY -PART 1 WAS PUBLISHED IN1808 AND PART 2 WAS PUBLISHED IN 1812. IT WAS MOST AUTHENTIC TEXT OF THOSE TIME AND WAS TRANSLATED TO FIVE EUROPEAN LANGUAGES.
LIFE VALUES.
THE VALUES BY WHICH WE LIVE,AND THE VALUES WHICH WE CONVEY TO OUR CHILDREN,ARE OUR MOST IMPORTANT SOCIAL ISSUES.
NOTHING MORE POWERFULLY DETERMINES THE SHAPE OF A CHILD'S LIFE THAN HIS HER VALUES , INTERNAL PROCESS,BELIEFS, SENSE OF RIGHT AND WRONG. A CHILD'S VALUE -MORE THAN HIS OR HER RACE , CLASS,SEX,ETHNICITY,NEIGHBORHOOD GENES,OR BACKGROUND-WILL DETERMINE THAT CHILD'S FATE.
SPECTROSCOPY.
SPECTROSCOPY IS A SCIENTIFIC MEASUREMENT TECHNIQUE. IT MEASURES LIGHT THAT IS EMITTED , ABSORBED OR SCATTERED BY MATERIALS AND CAN BE USED TO STUDY, IDENTIFY, AND STUDY THOSE MATERIALS.
DIFFERENT SUBSTANCES GIVE OFF A DIFFERENT SPECTRUM OF LIGHT WHEN THEY VAPORIZE, AND EACH SUBSTANCE PRODUCES A UNIQUE SPECTRUM, ALMOST LIKE A FINGERPRINT.
DALTON'S ATOMIC THEORY.
JOHN DALTON WAS AN ENGLISH SCHOOL TEACHER. IN 1805,HE DEVELOPED THE ATOMIC THEORY WHICH CONSIDERED TO BE ONE OF THE MOST SIGNIFICANT BREAKTHROUGHS IN CHEMISTRY.
ACCORDING TO THIS THEORY,ALL MATERS IS MADE UP OF ATOMS THAT ARE INDIVISIBLE AND INDESTRUCTIBLE- AND ALL ATOMS OF A GIVEN ELEMENT ARE IDENTICAL IN THEIR MASS PROPERTIES.
DALTON FURTHER STATED THAT COMPOUNDS ARE FORMED BY A COMBINATION OF TWO OR MORE DIFFERENT KINDS OF ATOMS, AND THAT A CHEMICAL REACTION INVOLVES A REARRANGEMENT OF ATOMS.
DALTON'S THEORY IS IMPORTANT BECAUSE IT GAVE SCIENTISTS THEIR FIRST GLIMPSE INTO THE NATURE OF THE ATOMS, AND STIMULATED FURTHER STUDIES IN THIS FIELD.
air pollution.
air pollution can cause many diseases like asthma etc..... the polluted gas not only affect people but also the environment.
Our Atmosphere
Our Atmosphere
In the solar system,life is not known to exist any planet other than the earth.
The zone of life on the earth is the biosphere.Atmosphere forms only a part of biosphere.
One of the important reason for the presence of life on earth is attributed to the process inaction is different zone of the atmosphere. Another significance of the atmosphere is the variety of gases. Many activities are resulted in atmospheric pollution. such activities without taking into account the significance of the atmosphere pose a threat to the very existence of mankind. so the protection of our atmosphere our responsibility.
