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Chemistry of silverSilver(Ag) is consider as a very valuable and precious metal.  A glossy and luminous metal known for its ornamental beauty, in periodic table  it is stand in 11(1b) Group and period 5 in between period 4 (Copper) and period 6 (Gold), and physical and chemical properties silver are intermediate between those two metals.                                                                                                           Element Properties Atomic Number          47Atomic Weight 107.868Melting Point 960.8 °C (1,861.4 °F)Boiling Point2,212 °C (4,014 °F)Specific Gravity10.5 (20 °C 68 °F)Oxidation State+1, +2, +3Electronic Configuration Kr4d105s11s22s22p63s23p63d104s24p64d105s1 Physical properties Silver is a fleecy, white metal with a shiny and glossy surface. It is the most tensile, elastic and malleable metal. The unique properties of silver is, it conducts heat and electricity better than any other element and it can also reflects light very well.The Melting point of Silver is about 960.8 °C (1,861.4 °F) and its Boiling point is about 2,000 to 2,200°C (3,600 to 4,000°F). Chemical properties Silver is not an active metal. Under normal circumstances it does not react with oxygen in the air.Silver react slowly with sulphur compound. Even it does not react readily with acids, water, or many other compounds. Silver is also known to be resistant to oxygen in air, silver will tarnish due to H2S(g)                                 2Ag(s)+H2S(g)?Ag2S(s)+H2(g) Pure silver metal is the best conductor of heat and electricity. Pure silver would be too soft for jewelry and utensils so it is usually alloyed with at least one other metal. Sterling silver, for example, is usually about 93% silver and 7% other metals, mostly copper. Role of silver in plant-soil system  The role of silver in Soil has always been vital to humans and bedrock to human health even it is the main processing for food production and is the major source of trace elements entering the food chain. The ”soil–plant systems” are tortuously linked where any change in soil chemical and biological properties are bound to have impact on plant growth, development and productivity.Due to presence of free-living nitrogen fixing bacteria and symbiotic relationship which involves bacteria and fungi, when silver nanoparticles widely reported to threaten soil-system-inhabitants so its affect soil’s physio-chemical characteristic.Hence, by negatively impacting ”soil–plant systems”-lead vital ecosystem services silver nanoparticles may potentially change ecosystem productivity and biogeochemistry. On ”soil–plant-systems” Nanoparticles interaction has also been strongly sympathised. Silver nanoparticles in soil Silver nanoparticles can be generated spontaneously from humanmade objects but because of a multidisciplinary use, silver nanoparticles can be come to soils from the wet or dry deposition of AgNPs suspended in air, or from point sources such as production facilities. AgNPs has vital role in organic wastes in agriculture, plant growth-promoting spray, sewage sludge recycling as a fertilizer to agricultural soils, waste incineration plants and land?ll. Fig. A   Status of the values for predicted environmental concentrations (PECs; shown as mode, i.e. Mostfrequent value) for Europe and the United States for soil and sludge-treated soils.Fig. BThe summary of major factors affecting silver nanoparticle (AgNP) toxicity.Silver nanoparticles impact on soil microbial system:Soil bacteria play a very important role in the breakdown of organic matter and nitrogen ?xation, which carry a symbiotic relationships with leguminous plant and provide a good source of ?xed nitrogen for both of them and other plants.  The Exposure of AgNPs may cause a dramatic effect in metabolic abilities and the diversity of soil microbial populations. Whereas in higher organic matter soils the response m

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