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Periodic table

                                   Periodic table ELEMENTS- Elements are pure from of matter that are made up of one type of atom. ·        DOBEREINER- Grouped all elements in three (triads). ·        NEWLAND- Observed that when elements are arranging in increasing order of their atomic mass. Every eighteen element beginning from any element resemble the first element in its physical and chemical properties. ·        DMITRI MENDLEVE- He is a Russian chemist gave the first periodic table of elements based on his law which states that “The properties of elements are the periodic functions of their atomic mass.”   ·        Modern periodic table was given by HENERY MOSELEY. Periodic table- A tabular form of elements in group and periods highlighting the regular trends in...
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Ammonium phosphate

                                            Ammonium phosphate Ammonium phosphate  is an ammonium  salt of orthophosphoric acid. It is a highly unstable compound with the  formula (NH 4 ) 3 PO 4 . Because of its instability, it is elusive and of no commercial value. A related "double salt", (NH 4 ) 3 PO 4 . (NH 4 ) 2 HPO 4  is also recognized but is too unstable for practical use. Both triammonium salts evolve ammonia. In contrast to the unstable nature of the triammonium salts, the  diammonium phosphate (NH 4 ) 2 HPO 4  monoammonium salt (NH 4 )H 2 PO 4,  are stable materials that are commonly used as fertilizers to provide plants with fixed nitrogen and phosphorus. PREPARATION OH AMMONIUM TRIPHOSPHATE Triammonium phosphate can be prepared in the laboratory by treating 85% phosphoric acid with 30% ammonia solution: ...
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Himalaya

             Himalaya The  Himalayas  constitutes an imposing crescent-shaped mountain range extending for over 2500  km from the south of the Indus Valley beyond Nanga Parbat in the west to Namcha Barwa in the east . The range varies in width from 350 km in the west to 150 km in the east. The majestic mountain chain showing prominent southward convexity stands like a wall bordering the entire northern margin of the Indian Subcontinent. Himalayas, Nepali Himalaya, great mountain system of Asia forming a barrier between th Plateau of tibet to the north and the alluvial plains of the Indian subcontinent to the south. The Himalayas include the highest mountains in the world, with more than 110 peaks rising to elevations of 24,000 feet (7,300 metres) or more above sea level. One of those peaks is Mount Everest (Tibetan: Chomolungma; Chinese: Qomolangma Feng; Nepali: Sagarmatha), the world’s highes...
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