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Simplified Chemistry

Quantum numbers

Quantum numbers: These are numbers which are used to specify the location and energy of an electron and size, shape and orientation of the orbital to which a particular electron belongs. Principal or total quantum number (n): This quantum number is identical with that used in Bohr Sommer field theory. …

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Bohr’s model of the atom

Bohr’s model of the atom Neil Bohr in 1913 observed that basic features of Rutherford’s atomic model namely presence of nucleus and revolving electrons were correct but that the electrons revolved round the nucleus in certain allowed circular orbits and that the electrons did not radiate and therefore its energy …

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Rutherford model of atom

Rutherford model of atom Rutherford observed that atom has all the positive charge concentrated in a very small central region called the nucleus and that nucleus is surrounded by negatively charged particles called electrons revolving in orbits. He proved that the force of attraction between electrons and nucleus was counter …

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Atoms

ATOMS Law of constant composition: This states that “A chemical compound (if pure) always contains the same elements combined together in the same proportion by mass regardless of bow the compound is prepared or from where it is obtained”. Law of conservation of mass: This is defined as “In every …

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NATURE AND SCOPE OF CHEMISTRY

NATURE AND SCOPE OF CHEMISTRY Chemistry. It is the branch of science which deals with the composition, preparation and properties of the substances. Main branches of chemistry: (1) Inorganic chemistry (2) Physical chemistry (3) Organic chemistry (4) Biochemistry (5) Analytical chemistry (6) Agricultural chemistry (7) Industrial chemistry. Scientific Methods : …

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