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picture1_Pdf Printable Periodic Table 194874 | Periodic Classification Of Elements Class X Science


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File: Pdf Printable Periodic Table 194874 | Periodic Classification Of Elements Class X Science
CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES OF ELEMENTS BY- A.P.S. BHADOURIYA, M.Sc. , B.Ed., NET, During the nineteenth century, chemists began to categorize the elements ...

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...Classification of elements periodicity in properties by a p s bhadouriya m sc b ed net during the nineteenth century chemists began to categorize according similarities their physical and chemical end result these studies was our modern periodic table lavoisier classified into metals non gases earths he some groups three which called triads triad had similar orderly newland an english chemist gave law octaves till then were known says that if are arranged increasing order atomic masses property every eighth element starting from first repeats publish list demerits limitations newlands octave it found applicable only upto calcium as after did not possess assumed existed nature no more would be discovered future but later on several new whose fit his adjusted two same slot also put unlike under note iron resembles cobalt nickel has been placed far away dmitri ivanovich mendeleev russian scientist relative honoured with noble prize for mendeleevs function comprised vertical horizontal col...
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