Arsenic tatva hai

इन्हें भी देखें: नीचे परमाणु क्रमांक (Z) तत्त्व का नाम प्रतीक आवर्त समूह द्रव्यमान ( 1 H 1 1 00,00,001 1.00794(7) 2 He 1 18 00,00,004 4.002602(2) 3 Li 2 1 00,00,006 6.941(2) 4 Be 2 2 9.012182(3) 5 B 2 13 00,00,010 10.811(7) 6 C 2 14 00,00,012 12.0107(8) 7 N 2 15 00,00,014 14.0067(2) 8 O 2 16 00,00,015 15.9994(3) 9 F 2 17 00,00,018 18.9984032(5) 10 Ne 2 18 00,00,020 20.1797(6) 11 Na 3 1 00,00,022 22.98976928(2) 12 Mg 3 2 00,00,024 24.3050(6) 13 Al 3 13 00,00,026 26.9815386(8) 14 Si 3 14 00,00,028 28.0855(3) 15 P 3 15 00,00,030 30.973762(2) 16 S 3 16 00,00,032 32.065(5) 17 Cl 3 17 00,00,035 35.453(2) 18 Ar 3 18 00,00,039 39.948(1) 19 K 4 1 00,00,039 39.0983(1) 20 Ca 4 2 00,00,040 40.078(4) 21 Sc 4 3 00,00,044 44.955912(6) 22 Ti 4 4 00,00,047 47.867(1) 23 V 4 5 00,00,050 50.9415(1) 24 Cr 4 6 00,00,051 51.9961(6) 25 Mn 4 7 00,00,054 54.938045(5) 26 Fe 4 8 00,00,055 55.845(2) 27 Co 4 9 00,00,058 58.933195(5) 28 Ni 4 10 00,00,058 58.6934(2) 29 Cu 4 11 00,00,063 63.546(3) 30 Zn 4 12 00,00,065 65.409(4) 31 Ga 4 13 00,00,069 69.723(1) 32 Ge 4 14 00,00,072 72.64(1) 33 As 4 15 00,00,074 74.92160(2) 34 Se 4 16 00,00,078 78.96(3) 35 Br 4 17 00,00,079 79.904(1) 36 Kr 4 18 00,00,083 83.798(2) 37 Rb 5 1 00,00,085 85.4678(3) 38 Sr 5 2 00,00,087 87.62(1) 39 Y 5 3 00,00,088 88.90585(2) 40 Zr 5 4 00,00,091 91.224(2) 41 Nb 5 5 00,00,092 92.906 38(2) 42 Mo 5 6 00,00,095 95.94(2) 43 Tc 5 7 00,00,098 [98.9063] 44 Ru 5 8 00,00,101 101.07(2) 45 Rh 5 9 00,00,102 102.90550(2) 46 Pd 5 10 00,00,106 10...

अनुक्रम • 1 इतिहास • 2 प्रचुरता • 3 ज्ञात रासायनिक तत्त्व (118) • 4 इन्हें भी देखें • 5 बाहरी कड़ियाँ इतिहास [ ] तत्व शब्द के साहित्यिक अर्थ अनेक हैं, पर पृथ्वी, जल, तेजस, वायु और आकाश की गणना बहुत पुराने समय से होती आ रही है। पंचज्ञानेंद्रियों से रूप, रस, गंध स्पर्श और शब्द इन पंचतन्मात्राओं, पंचविषयों या पाँच संवेदनाओं की अनुभूति होती है और जिन स्थूल भूतों के कारण ये पंचतन्मात्राएँ व्यक्त होती हैं उन्हें ही पंचतत्व कहते हैं। सांख्य और वैशेषिक दर्शनों के आधार पर पृथ्वी का गुण गंध है और तद्विषयक ज्ञानेंद्रिय नासिका है, जल का गुण रस है और तद्विषयक ज्ञानेंद्रिय रसना या जिह्वा है, तेजस् या अग्नि का गुण रूप है और तद्विषयक ज्ञानेंद्रिय चक्षु है, वायु का गुण स्पर्श है और तद्वविषयक ज्ञानेंद्रिय त्वचा है तथा आकाश का गुण शब्द है, जिससे संबंध रखनेवाली ज्ञानेंद्रिय कर्ण हैं। पृथ्वी, अग्नि, जल धातु और काष्ठ। इन विद्वानों ने तत्व शब्द की कभी स्पष्ट परिभाषा देने की चेष्टा नहीं की। यूरोप में 16वीं शती में रसायन के क्षेत्र का विस्तार हुआ, मामूली धातुओं को स्वर्ण में परिणत करना और आयु बढ़ाने एवं शरीर को निरोग करने के लिये ओषधियों की खोज करना रसायन का लक्ष्य बना। तत्व के संबंध में सबसे अधिक स्पष्ट विचार स्टाल ने चार तत्व माने थे अम्ल, जल, पृथ्वी और फलॉजिस्टन। यह अंतिम तत्व वस्तुओं के जलने में सहायक होता था। रॉबर्ट बॉयल की परिभाषा को मानकर रसायनज्ञों ने तत्वों की सूची तैयार करनी प्रारंभ की। बहुत समय तक पानी तत्व माना जाता रहा। 1774 ई॰ में प्रकृति में कितने तत्व हो सकते हैं, इसका पता बहुत दिनों तक रसायनज्ञों को न था। अत: तत्वों की खोज के इतिहास में बहुत से ऐसे तत्वों की भी घोषणा कर दी गई, जिन...

Key facts • Arsenic is naturally present at high levels in the groundwater of several countries. • Arsenic is highly toxic in its inorganic form. • Contaminated water used for drinking, food preparation and irrigation of food crops poses the greatest threat to public health from arsenic. • Long-term exposure to arsenic from drinking-water and food can cause cancer and skin lesions. It has also been associated with cardiovascular disease and diabetes. In utero and early childhood exposure has been linked to negative impacts on cognitive development and increased deaths in young adults. • The most important action in affected communities is the prevention of further exposure to arsenic by provision of a safe water supply. Overview Arsenic is a natural component of the earth’s crust and is widely distributed throughout the environment in the air, water and land. It is highly toxic in its inorganic form. People are exposed to elevated levels of inorganic arsenic through drinking contaminated water, using contaminated water in food preparation and irrigation of food crops, industrial processes, eating contaminated food and smoking tobacco. Long-term exposure to inorganic arsenic, mainly through drinking-water and food, can lead to chronic arsenic poisoning. Skin lesions and skin cancer are the most characteristic effects. Sources of exposure Drinking-water and food The greatest threat to public health from arsenic originates from contaminated groundwater. Inorganic arsenic is n...

Clinical Information Arsenic circulating in the blood will bind to protein by formation of a covalent complex with sulfhydryl groups of the amino acid cysteine. Keratin, the major structural protein in hair and nails, contains many cysteine residues and, therefore, is one of the major sites for accumulation of arsenic. Since arsenic has a high affinity for keratin, the concentration of arsenic in hair is higher than in other tissues. Arsenic binds to keratin at the time of exposure, "trapping" the arsenic in hair. Therefore, hair analysis for arsenic is not only used to document that an exposure occurred, but when it occurred. Hair collected from the nape of the neck can be used to document recent exposure. Axillary or pubic hair is used to document long-term (6 months-1 year) exposure. Interpretation Hair grows at a rate of approximately 0.5 inch/month. Hair keratin synthesized today will protrude through the skin in approximately 1 week. Thus, a hair specimen collected at the skin level represents exposure of 1 week ago, 1 inch distally from the skin represents exposure 2 months ago, etc. Hair arsenic levels above 1.00 mcg/g dry weight may indicates excessive exposure. It is normal for some arsenic to be present in hair, as everybody is exposed to trace amounts of arsenic from the normal diet. The highest hair arsenic observed at Mayo Clinic was 210 mcg/g dry weight in a case of chronic exposure that was the cause of death. Clinical Reference 1. Sthiannopkao S, Kim K-W, ...

How toxic is arsenic? Arsenic poisoning, or arsenicosis, occurs after the ingestion or inhalation of high levels of arsenic. Arsenic is a type of carcinogen that’s gray, silver, or white in color. Arsenic is extremely poisonous to humans. What makes arsenic especially dangerous is that it doesn’t have a taste or odor, so you can be exposed to it without knowing it. While arsenic is naturally occurring, it also comes in inorganic (or “man-made”) formulas. These are used in agriculture, mining, and manufacturing. Arsenic poisoning tends to occur most often in areas of industrialization, whether you work or live there. Countries that have high levels of arsenic-containing groundwater include the United States, India, China, and Mexico. Symptoms of arsenic poisoning may include: • red or swollen skin • skin changes, such as new warts or lesions • abdominal pain • nausea and vomiting • diarrhea • abnormal heart rhythm • muscle cramps • tingling of fingers and toes Long-term exposure to arsenic can cause more severe symptoms. You should seek emergency help if you experience any of the following after a suspected arsenic exposure: • darkening skin • constant sore throat • persistent digestive issues According to the World Health Organization, long-term symptoms tend to occur in the skin first, and can show up within five years of exposure. Cases of extreme poisoning may lead to death. Contaminated groundwater is the most common cause of arsenic poisoning. Arsenic is already prese...

हिंदू धर्म में प्रकृति की हर एक सजीव व निर्जीव वस्तु की उत्पत्ति के बारे में विस्तार से बताया गया (Panch Tatva In Hindi) हैं। सभी वस्तुएं मुख्यतया केवल 5 तत्वों से मिलकर बनी होती है जिन्हें प्रकृति के पांच तत्व कहते हैं। अंत में सभी वस्तुएं इन्हीं पंच तत्वों में समा जाती है फिर चाहे वह मानव शरीर हो या किसी जानवर का या फिर कोई निर्जीव वस्तु या पेड़-पौधे। अब आप सोच रहे होंगे कि यह पंच तत्व कौन कौन से हैं? तो इन पांच तत्वों के नाम हैं: आकाश, पृथ्वी, जल, वायु व अग्नि। इन्ही पांच तत्वों से मिलकर ही हर चीज़ का निर्माण होता (5 Tatva In Hindi) है किंतु विभिन्न वस्तुओं में इनकी मात्रा भिन्न-भिन्न होती है। इनके मिलने से एक निर्जीव वस्तु का निर्माण होता है जिसमें प्राण नही होते है। किसी वस्तु को सजीव बनाने के लिए इसमें परमात्मा का स्वरुप अर्थात आत्मा का होना आवश्यक है। कहने का अर्थ यह हुआ कि पंचतत्व मिलकर एक निर्जीव वस्तु का निर्माण कर सकते है या सरल शब्दों में (Panch Tatva Of Human Body In Hindi) कहे तो एक देह का निर्माण। जब इस देह में आत्मा का प्रवेश होता है तो इसमें प्राण आते है और वह वस्तु सजीव बन जाती है। जब आत्मा उस देह को त्याग देती है तब वह निर्जीव हो जाती हैं और फिर से इन्ही पंचतत्वो में मिल जाती है। पंचतत्व क्या है (Panchtatva In Hindi) पंचतत्व में 5 तत्व आते है जिनका अलग-अलग अर्थ हैं। यहाँ पर पांचो तत्व भिन्न-भिन्न चीजों का प्रतिनिधित्व करते है। आइये जाने: #1. आकाश तत्व के बारे में जानकारी (Aakash Tatva In Hindi) आकाश का तात्पर्य अनंत से है जो हमारा शारीरिक संतुलन बनाए रखता है। इसी के द्वारा हमारे शरीर में शब्दों व वाणी का निर्माण होता है। इसका वर्ण काला रंग है। शरीर की स्थि...

Arsenic circulating in the blood will bind to protein by formation of a covalent complex with sulfhydryl groups of the amino acid cysteine. Keratin, the major structural protein in hair and nails, contains many cysteine residues and, therefore, is one of the major sites for accumulation of arsenic. Since arsenic has a high affinity for keratin, the concentration of arsenic in hair is higher than in other tissues. Arsenic binds to keratin at the time of exposure, "trapping" the arsenic in hair. Therefore, hair analysis for arsenic is not only used to document that an exposure occurred, but when it occurred. Hair collected from the nape of the neck can be used to document recent exposure. Axillary or pubic hair is used to document long-term (6 months-1 year) exposure. Hair grows at a rate of approximately 0.5 inch/month. Hair keratin synthesized today will protrude through the skin in approximately 1 week. Thus, a hair specimen collected at the skin level represents exposure of 1 week ago, 1 inch distally from the skin represents exposure 2 months ago, etc. Hair arsenic levels above 1.00 mcg/g dry weight may indicates excessive exposure. It is normal for some arsenic to be present in hair, as everybody is exposed to trace amounts of arsenic from the normal diet. The highest hair arsenic observed at Mayo Clinic was 210 mcg/g dry weight in a case of chronic exposure that was the cause of death. 1. Sthiannopkao S, Kim K-W, Cho KH, et al: Arsenic levels in human hair, Kandal Pro...

Element Properties atomic number 33 atomic weight 74.921595 melting point (gray form) 814 °C (1,497 °F) at 36 atmospheres pressure density (gray form) 5.73 g/cm 3 at 14 °C (57 °F) (yellow form) 2.03 g/cm 3 at 18 °C (64 °F) oxidation states -3, +3, +5 electron config. 1 s 22 s 22 p 63 s 23 p 63 d 104 s 24 p 3 History Arsenic was known in the form of certain of its bce Aristotle wrote of a substance called sandarache, now believed to have been the ce, the writers auripigmentum, a substance now thought to have been the dyestuff 2 3. By the 11th century ce three species of “arsenic” were recognized: white (As 4 6), yellow (As 2S 3), and red (As 4S 4). The element itself possibly was first observed in the 13th century by Albertus Magnus, who noted the appearance of a metal-like substance when arsenicum, another name for As 2S 3, was heated with soap. It is not certain, however, that this natural scientist and scholar actually observed the free element. The first clearly authentic report of the free substance was made in 1649 by Johann Schroeder, a German pharmacist, who prepared arsenic by heating its oxide with charcoal. Later, Nicolas Lémery, a French physician and chemist, observed the formation of arsenic when heating a mixture of the oxide, soap, and Occurrence and distribution The abundance of arsenic in the 4S 4; orpiment, As 2S 3; 2; and 3AsS 4. Arsenic oxide is also common. Most commercial arsenic is recovered as a by-product of the smelting of copper, lead, Only one s...