20 Facts About the Chemical Element Silver

Silver is a precious metal that has been known since ancient times. But the element silver has many more uses today than just decoration or as a form of monetary exchange. Silver History 1. The word silver comes from the  Anglo-Saxon word  seolfor.  There is no word that rhymes with the English word silver. It is a transition metal element, with symbol Ag, atomic number 47, and atomic weight of 107.8682. 2. Silver has been known since antiquity. It was one of the first five metals to be discovered. Mankind learned to separate silver from lead in 3000 BCE. Silver  objects have been found dating from before 4000 BCE. It is believed the element was discovered around 5000 BCE. 3. The chemical symbol for silver, Ag, comes from the  Latin word for silver, argentum, which in turn derives from the Sanskit word  argunas, which means shining. 4. The words for silver and money are the same in at least 14 languages. 5. Coins minted in the United States before 1965 consist of about 90% silver. Kennedy half dollars  minted in the United States  between 1965 to 1969 contained 40% silver.   6. The price of silver currently is less than that of gold, varying according to demand, the discovery of sources, and the invention of methods of separating the metal from other elements. In ancient Egypt and Medieval European countries, silver was valued more highly than gold. 7. The primary source of silver today is the New World. Mexico is the leading producer, followed by Peru. The United States, Canada, Russia, and Australia also produce silver.  Around two-thirds of the silver obtained today is a by-product of copper, lead, and zinc mining. Silver mines in Mexico, such as this now-abandoned one, provided 18th century Spain with over one third of the silver sent out of the New World. Danny Lehman / Getty Images Chemistry of Silver 8. Silvers atomic number is 47, with an atomic weight of 107.8682. 9. Silver is stable in oxygen and water, but it  tarnishes in the air because of a reaction with sulfur compounds to form a black sulfide layer. 10. Silver can exist in its native state. In other words, nuggets or crystals of pure silver exist in nature. Silver also occurs as a natural alloy with gold that is called electrum. Silver commonly occurs in copper, lead, and zinc ores. 11. Silver metal is not toxic to humans. In fact, it can be used as a food decoration. However, most silver salts are toxic. Silver is germicidal, meaning it kills bacteria and other lower organisms. 12. Silver is the best electric conductor of the elements. It is used as the standard by which other conductors are measured. On a scale of  0 to 100, silver ranks 100 in terms of electrical conductivity. Copper ranks 97 and gold ranks 76. 13. Only gold is more ductile than silver. An ounce of silver can be drawn into a wire 8,000 feet long. 14. The most commonly encountered form of silver is sterling silver. Sterling silver consists of 92.5% silver, with the balance consists of other metals, usually copper. 15. A single grain of silver (about 65 mg) can be pressed into a sheet 150 times thinner than the average sheet of paper. 16. Silver is the best thermal conductor of any metal. The lines you see in the rear window of a car are made of silver, used to defrost ice in the winter. 17. Some silver compounds are highly explosive. Examples include silver fulminate, silver azide, silver(II) oxide, silver amide, silver acetylide, and silver oxalate. These are compounds in which silver forms a bond with nitrogen or oxygen. Although heat, drying, or pressure often ignite these compounds, sometimes all it takes is exposure to light. They may even explode spontaneously. Silvers Uses 18. Uses of silver metal include currency, silverware, jewelry, and dentistry. Its antimicrobial properties make it useful for air conditioning and water filtration. It is used to make mirror coatings, for solar energy applications, in electronics, and for photography. 19. Silver is exceptionally shiny. It is the most reflective element, which makes it useful in mirrors, telescopes, microscopes, and solar cells. Polished silver reflects 95% of the visible light spectrum. However, silver is a poor reflector of ultraviolet light. 20. The compound silver iodide has been used for cloud seeding, to cause clouds to produce rain and try to control hurricanes. Sources Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. Amsterdam.Hammond, C. R. (2004). The Elements, in Handbook of Chemistry and Physics (81st ed.). Chemical Rubber Company Publishing. Boca Raton, Fla.Weast, Robert (1984). Handbook of Chemistry and Physics. Chemical Rubber Company Publishing. pp. E110. Boca Raton, Fla.

Gender Inequality And Gender Double Standards - 1777 Words

Labels are inflicted on both males and females when they are not suiting the culturally molded gender roles. Double standards concepts that are considered passable employed by one group of people but are deemed inadmissible by when employed by another group. We all know that there is innumerable gender double standards that exist it is an issue that everyone has faced or had to deal with being male or female. In society it is often to see that one set of standards does not pertain to or viewed the same way for women as it does to men inversely. Double standards are a way of exuding unfairness but almost making it justifiable by labeling it. There are many different aspects that allow gendered stereotypes. These double standards†¦show more content†¦Gender stereotypes for women in the military lead to obstacles for, which can negatively impact her career in the service. The number of women who join the Marines has increased tremendously despite the disparities that they stil l face. The Marine Corps is viewed as the toughest branch of the military but women still enter in to this branch. Women performance is always compared to being incompetent when in reality they are able to perform just as well as men but stereotypes always foreshadow this view. The author includes â€Å"Women perform superbly, but gender stereotypes persist and highlight contradictions between policy and reality† (Archer, 2013). Gender double standards have tarnished the performances of female soldiers and can undermine them. Double standards cause issues such as thinking that women are incapable and incompetent and should be protected. Many of the male soldiers in the Marines felt as if it is their duty to protect and help the female soldiers as if they aren’t able to protect themselves. Men are able to protect themselves simply because they are men being a women they are enable to be the protector but viewed as nurtures. Women are stereotyped as nurtures and the peacemakers. Women were sent as â€Å"female engagement teams† to bond with the Afghani in attempts to gain the trust of Afghan women like pawns. In society today it is common to see the women used and portrayedShow MoreRelatedEssay about Gender Inequality1428 Words   |  6 Pagesovercome the obstacle of gender inequality and evolved into a society of fairness and righteousness. As many know, females can be just as proficient and qualified as males at any task. Though some efforts to off-set this gender imbalance is in place, it is still commonly acknowledged that many careers are stated to be a male job such as lawyers, and female jobs such as secretaries. Gender inequality is a visible fact in our society and in this essay, I hypothesize that gender inequality still exists as aRead MoreWe Should All Be Feminists1084 Words   |  5 Pagescontain gender issues about sexuality, gender inequality and double standard, which show that the idea of feminists is still needed in present-day. 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Cleanliness Recycling and Comprehensive National High Free Essays

CLEANLINESS By: Edgardo Eleccion ( GCCNHS) The often quoted saying is â€Å"Cleanliness is next to Godliness†. People are so busy thinking what possible solution to make in order to maintain cleanliness for a worldwide issue. The air, water and soil are not polluted. We will write a custom essay sample on Cleanliness: Recycling and Comprehensive National High or any similar topic only for you Order Now This is the very issue of cleanliness that need an immediate action, a problem to be addressed. Gingoog City Comprehensive National High School ( GCCNHS) community has campaigned on zero waste management program on waste segregation by bio and non-biodegradable scheme. Stakeholders either direct and indirect have been oriented on this scheme on waste segregation. However, students either young or old still can’t follow simple instructions. A kind of system within a person to discipline him to do what is good in saving the environment and saving the generation ahead. United Nations and some of the environmental friendly establishments and organizations have join forces to launch a program for a greener world. The join effort is now part of their mission in their business and organization. However, if one is not performing its task to save this planet, then who else would clean up our mess? We should not wait for others to do the task, today is the right time. Sometimes our mind set reflects our own actions. Do we mind the earth we are living now? Are we ready to pass this world to the next generation after us? What else should we do to give this legacy a worthwhile for them? Symposium, memorandum, policies, bills, laws and rules have been done even in school and communities. Reduction, reforestation, redirection, recycle and reuse policies have been adopted. Still we continue making dirt to this paradise God given gift to us. This world is the package of our existence. This is not ours. We just borrow this. We live this for free, is it not proper to clean the earth we lend form the Maker? Edgardo Eleccion is a secondary teacher of Gingoog City Comprehensive National High School ( GCCNHS) Gingoog City, Philippines. He is a Values Education Teacher. How to cite Cleanliness: Recycling and Comprehensive National High, Papers

Wearable Engineering and Technology

Question: Discuss about the Wearable Engineering and Technology. Answer: Introduction: Wearable device is defined as a small computing device, which is designed in such a way that the consumers could wear it. The device communicates with the help of mobile device or a computer having Bluetooth (Wright, and Keith 2014). This device could do many tasks in the form of hand held technologies. The goal of this device is incorporating a portable computer in the daily lives of the human being.b) The general applications of the wearable dev ice are as follows: Activity Tracker- This wearable device helps in monitoring the activities that are related to the fitness of the people. It evaluates the walking distance of a man, pulse, sleep patterns, heart rate and pulse. The device integrates wirelessly with the mobile app or web for increasing the capability of the device. Smart Watch: This wearable device besides showing time, it also functions for communicating wirelessly. It helps in answering the call, browse in the web, read as well as send messages and music player. It also acts as a fitness tracker and GPS. The device incorporates the use of touch screen (Skiba 2014). Smart Glass: This device helps the user in viewing the information, click photos and videos that are in the vision of the user. The user controls the device by voice commands and control touching on the glass frame. The user of this device has the access to run the app wearing the smart glasses displaying the stats of the flight. Smart glasses also includes the mobile apps like tracking of fitness and GPS. The consumer related issues faced by the wearable products are as follows: The infancy product styles are not attracting many customers as the customers are getting great style of watches and fashion product. The product is lacking the skill of design on engineering side of devices and the fashion of the product is bad. The people are not convinced to switch from the brands to the wearable device just because the digital technology is integrated with it. The solution for the above customer relation could be eliminated by applying the following steps: The fashion industry should be integrated with the wearable technologies at the beginning of the design stage. This will help in having a fancy product that is well designed and with modern fashion that will drive the customer towards the product (Kalinauckas 2015). The consumers should be engaged to a sensitive reactions so that they would love to use the wearable technologies. The fashion as well as the performance of the product should be given the first priority and the measures of the parameters technically should be given second priority. The revolution in this industry requires fashion designers, engineers and the people who are excellent in coding. The value of augmentation should really be strong and attracting for driving the people to use this technology (Barefield 2015). The product could be slimmed from the bulky elements to make it more fashionable. The use of Nano-Technology could be implemented in slimming down the products. The wearable technologies have a growth in future. The developers should focus on the need of the consumers and not of the capability of their production. The devices in order to gain success should give the requirement of the customer the highest priority. The apps for the wearable technologies are as follows: Tesco Grocery: Shopping in the Tesco is the most useful application for shopping. It helps in scanning the barcode of the product by aid of built in camera of Google glass or with the help of a voice search that automatically add the product in the online basket (Stoppa and Chiolerio 2014). Glass Captioning: This app helps in recognizing the speech and display in the form of caption in front of the eyes. This technology is integrated with the smart phone. Star chart: This is an application of astronomy. It helps in gaining knowledge about the stars and constellations. Golfsight: This app is appropriate for the golfers. This app is a rangefinder with the help of GPS. It gives satellite image and provides the distance. Field Trip: This app acts as the tourist guide giving details on the local history, design and architectures. IFTTT: This app helps in bringing the tech to the Google glass. It makes the online job easier by automating the the provided task. Guardian: This app helps in bringing headlines and news in front of the eyes. The news could also be saved for future reading. Light Meter: It helps in computing the lighting conditions and also provides F-stop and suggestions regarding ISO for getting a better shot. KitchMe: if the fingers are sticky then it could be troublesome for using the tablet to read the recipes during cooking. This app helps in showing the ingredients requires during cooking as well as direct the instructions loudly (Dinges et al. 2015). Reference List Barfield, W. ed., 2015.Fundamentals of wearable computers and augmented reality. CRC Press. Dinges, V., Urmetzer, F., Martinez, V., Zaki, M. and Neely, A., 2015. THE FUTURE OF SERVITIZATION: Technologies that will make a difference.Cambridge Service Alliance Executive Briefing Paper. Kalinauckas, A., 2015. Wearable technology.Engineering Technology,10(4), pp.36-43. Skiba, D.J., 2014. Emerging technologies center.Nursing Education Perspectives,35(5), pp.346-347. Stoppa, M. and Chiolerio, A., 2014. Wearable electronics and smart textiles: a critical review.Sensors,14(7), pp.11957-11992. Wright, R. and Keith, L., 2014. Wearable technology: If the tech fits, wear it.Journal of Electronic Resources in Medical Libraries,11(4), pp.204-216.