The symbol “As” from the periodic table, belongs to the chemical element Arsenic. Its located in group 15, period 4, and is clasificat as semi-metals. Arsenic’s atomic number is 33, and has a density of 5.776 grams per cubic centimeter. Arsenic melting point is 1090 K (817°C or 1503°F) and the boiling point is 887 K (614°C or 1137°F). The element specific gravities are 1.97 and 5.73, they are respectively to his two solid modifications: yellow, and grey (or metallic). Arsenic’s appearance is steel
A huge fascination of arsenic started in the 19th century when people got word of a province in southeastern Austria where people ate arsenic. Women would eat arsenic to help gain weight and fix their complexion to look more beautiful and men would eat arsenic because they believed it helped them breath easier when they were climbing high up in the mountains. One doctor by the name of Dr. Robert Craig MacLagan, was particularly interested in this and visited the town to see for himself what was really
Arsenic Element 33: Arsenic Abstract Arsenic is element 33 on the periodic table and is in Group 15. Arsenic is obviously an extremely poisonous element; however, some people have found arsenic to have a restorative effect on them. Chemically, arsenic is a metalloid. Two common forms of arsenic are gray and yellow. (see Figure 1-A) Element 33 has an atomic weight of 74.9216 and the chemical symbol of As. It boils at 613ºC, melts at 817ºC, and has a density of 5.72. (see Figure 2-A)
Background/Introduction Arsenic is a naturally occurring element that has been known to be a very toxic poison for hundreds of years. This metalloid has properties of metals and nonmetals. It has two forms, the organic forms including arsenobetaine, arsenocholine, MMA and DMA and the inorganic forms including As (III) and As(V). This poison can be dated as far back as 3000 years ago in Chinese medicine that is still used today. Egyptians used arsenic as a way to harden copper and as embalming fluid
Arsenic Accumulation By Hemanth Ande Research Plan A. Specific Aims Arsenic is a common element that has been part of the human civilization for more than 2000 years. It has been used as medicine in the western and eastern world in ways that would not be sanctioned today. In modern times Arsenic is used in agricultural, medical use and industrial use. Although it is considered a toxic compound in high dose, humans are exposed to the compound every day. Currently there is no comprehensive report
Arsenic, a heavy metal with an unknown biological function, is widely acknowledged for its biological toxicity in human health. The occurrence of Arsenic in the immediate environment comes both as a result of natural (e.g. naturally contaminated groundwater) and artificial (e.g. percolation of water from mines) causes. Arsenic is a highly occurring contaminant in groundwater in many areas of the world. These include countries such as Cambodia, Argentina, Chile, Hungary, Mexico, Bangladesh and the
advanced in the 5th century BC by Empedocles—that all things are composed of air, earth, fire, and water—was influential in alchemy. The Roman emperor Caligula is said to have instituted experiments for producing gold from orpiment, a sulfide of arsenic, and the emperor Diocletian is said to have ordered all Egyptian works concerning the chemistry of gold and silver to be burned in order to stop such experiments. Zosimus the Theban (about AD 250-300) discovered that sulfuric acid is a solvent of
imagination to play with cards that neither talk nor move and alot of creativity to design a deck of Magic or Pokemon cards. Another thing that makes Top Deck so interesting to its audience is the sarcastic tone of writing that laces the sentences like arsenic. An article contained in the section called Top Disc, on E3 (Electronic Entertainment Expo) previews computer and console games that will be released for the rest of this year and possibly next year (35-45). The article is sometimes humorous to read
clouds of gas killing 5,000 soldiers and putting 1,500 more out of the war. This caused great panic because nothing like this had happened before and wasn't expected by the allies. Previous to this event in the Middle Ages they used such things as arsenic and more natural things as chemicals which were as powerful as the chlorine gas ended up being in WWI. Chemical weapons were used many times after the Germans used chlorine gas in WWI, chlorine, phosgene, benzyl bromide, hydrogen cyanide, and then
time by her father. During this time she meets Homer, a man the townspeople consider beneath her who seems to almost replace her father. She finally seems to have found happiness, but is then seen buying poison in the local drug store. She asks for arsenic and refuses to tell the druggist what it is for. The townspeople think she is going to kill herself. Later they will find out how wrong they were! The townspeople try to pressure Miss Emily to marry Homer because they call their relationship improper
differences between animals and humans. ¨ Rats are 37% effective in identifying what causes cancer in humans. (Vivisectors don't have a clue and flipping a coin would be more useful). ¨ According to animal tests lemon juice is a deadly poison but arsenic, hemlock and botulin are safe. ¨ 95% of drugs passed by animal tests are immediately discarded as useless or dangerous to humans
summer of Emily’s father’s death. They started seeing each other but Homer would rather hang out with the guys than hang out with Emily. He was not the marrying type. When Emily figured this out she bought some arsenic from a druggist. The townspeople thought she was going to use the arsenic to kill herself. However the next week they were sure homer and Emily would get married because Emily had been seen at the jeweler’s ordering a man’s toilet set in silver, with the letters H.B. on each piece
a. Review the effects of arsenic as a soil pollutant on human health. You need to consider the major sources of arsenic (both natural & man-made), pathways for uptake by people and the impacts on human health. Soil pollution due to Arsenic (As) has been grabbed much attention in recent years due to its intimidation to human health and unfavorable effects on the growth of animals and plants (Duker et al , 2005; Williams et al., 2005). Volcanisms released Arsenic in the air which is brought
such as wood, paper, textile, farm sprays, and Hospital disinfectants. To get pure tin you must first find ore cassiterite or tin stone, a dioxide of tin. The ore cassiterite before smelting and roasting must be crushed into a powder to remove the arsenic and sulfur from the ore cassiterite. When you smelter the tin you must heat it with carbon to remove the zinc, copper, bismuth, and iron from the tin. Tin had been used for many things but tins use is dropping rapidly although tin is still used a
upon the factors involved. These factors need to be looked at when determining an ecosystem's disturbance by a pollutant. Some of the most frequent pollutants in our ecosystem include: gases such as sulphur dioxide, elements such as mercury and arsenic, and even pollution by nutrients which is referred to as eutrophication. Each of these pollutants pose a different effect on the ecosystem at different doses. This varied effect is what is referred to as dose and duration. The amount of the pollutant
Effects of Arsenic Exposure on Gene Expression in Breast Cancer Cells A) SPECIFIC AIMS Breast cancer is the second leading cancer to cause death in women. A combination of factors contributes to the etiology of breast cancer, such as genetic and environmental dynamics [ACS, 2014]. One particular area of interest is the study of metalloestrogens, which are inorganic compounds that can bind to the estrogen receptor and mimic the biological functions of estrogen in breast cancer cells. Arsenic is one such
Critique on Arsenic and Old Lace On Thursday, April 7th I attended the production Arsenic and Old Lace at the Cape Fear Regional Theatre. I have never heard of this play so I was very interested to see what it was about. The three main factors that I focused on was the lighting, scenery, and costumes they all had great detail but there were a couple mistakes that I believed should have been improved. The lighting was good it was a simple yellow light that focused on the production most of the time
When reading through Arsenic and Old Lace I didn’t catch the humor at first. When just reading through the events that happen, it sounds very dark and demented, until later in the script when the crazy events keep happening and it’s impossible not to find comedy in their absurdity. Watching the film version also brought to my attention the comedic value in the character’s reactions to what is happening. I felt that Arsenic and Old Lace expressed comedic most predominately through farce, situational
Imagine if you came across two sweet little old ladies who were secretly serial killers on the side. Arsenic and Old Lace is a play set around the 1940s which combines both farce and thrill together in order to create a story that will keep anticipation high, and the audience on the edge of their seats for the whole show. The main plot regards two older ladies named, Martha, and Abby, who start off by having murdered a total of 11 men. When caught by Mortimer, they show no remorse and are very open
9 CONCLUSION AND RECCOMENDATIONS 9.1 Conclusions The autoclave oxidation of sulphur, selenium and arsenic has been studied in terms of investigating the dissolution behaviour in an alkaline system. Also the mathematical description of the interfacial mass transfer rate of the primary oxidant-diatomic oxygen (O2) molecule) from the gas to the liquid phase has been evaluated. The conclusions are summarized as follows: 9.1.1 Reaction Chemistry of sulphur In the alkaline pressure oxidation of PGM’s system