Carl Wilhelm Scheele

the left is of Carl Wilhelm Scheele, He was Swedish chemist who discovered many elements in the history of science. He was one of those people who never took any credits in his favor. The element chlorine was discovered by him in 1774, when he reacted hydrochloric acid (HCL- a solution made up of hydrogen chloride) with manganese dioxide (MnO2). 4HCl + MnO2 - MnCl2 + 2H2O + Cl2 According to Jack challoner, in his book “The elements” he says, after the reaction has occur “Scheele noted that gas

Scheele has done so many great things in the world of chemistry including his discovery of Tungsten, which was Dave’s favorite metal. Not only did Scheele’s discoveries make him a hero for Dave, but also his dedication to his work without wanting the fame and money. Sacks's use of a hero also demonstrates an example of how passion drives romance for science “Scheele epitomized for me the romance of science”(Sacks 219). Scheele was “wholly dedicated to his single

prescription filled, print out a computer document like this one, or even drive a car. (Abelson 94)      Chlorine, a member of the halogen (salt-forming) group of metallic elements, was first made by Swedish chemist Carl Wilhelm Scheele in 1774, who treated hydrochloric acid with manganese dioxide. In 1810, the English chemist

Joseph Priestly was an English scientist who found out about oxygen. Joseph Priestly had thought before that there was more than one type of air. He discovered eight gases of which one was oxygen. The element of oxygen was discovered by him during his many experiments. He did this by an experiment involving the isolation of oxygen and carbon dioxide. Joseph Priestly discovery of oxygen was significant by revealing the process of photosynthesis. Joseph Priestly discovered oxygen because of where

separate occasions in the same year of 1774. The men who discovered it were Joseph Priestly and Carl Wilhelm Scheele. Joseph Priestly was born in 1733 in Wiltshire, England. He was a very smart young child, learning six languages before he reached high school. He also had a very large passion for chemistry. After he discovered oxygen, he used his discoveries to invent carbonated water. Carl Wilhelm Scheele was born in 1733 in Uppsala, Sweden. When he was 22 years old, he got a job at a pharmacy, and

reactive, chlorines is combined with other elements and compounds has been used to produce essential products. Chlorine was discovered in 1774, by the Swedish chemist Carl Wilhelm Scheele, he observed a greenish gas when he combined manganese dioxide and hydrochloric acid. Carl Wilhelm Scheele thought the gas contained oxygen. Carl didn’t realize that had generated an unknown chemical element. In 1810 a British scientist called Sir Humphrey Davey identified the gas as a distinct chemical element

In 1774, a man by the name of Carl Wilhelm Scheele discovered the element Chlorine when he was combining the mineral pyrolusite with hydrochloric acid. Mr. Scheele had first thought that the gas he had just discovered contained oxygen, but that was not the case. Later, in 1810, Sir Humphry Davy proved that chlorine was a distinct element. During World War I, chlorine was used. It was the first poisonous gas used in warfare. Because of the choking odor, chlorine’s alias is “Choking Charlie”. On the

Astronomy is an ongoing process because it has changed the world and continues to throughout time. For example, NASA astronauts have continued in their mission to establish a human settlement on Mars from the first successful flyby of Mariner 4 to the current Mars rover, the Curiosity. NASA has even planned future missions to the planet. For example, they have future plans for a rover called the ExoMars Rover to be sent in 2018 that will carry the equipment needed to truly answer if life ever existed

carbon dioxide. Nitrogen is the the element that is the most plentiful in the atmosphere. Even though it can be found in minerals and ammonia, nitrogen is mostly found in the atmosphere. It was discovered by a Swedish chemist by the name of Carl Wilhelm Scheele in 1772. It is a colorless, odorless gas and is the eighth element on the periodic table. Argon is third most plentiful element in the atmosphere. It was discovered by Lord Rayleigh and Sir William Ramsay in 1894. It is colorless and odorless

Chloride is derived from the Greek word “chloros” meaning pale green. It was discovered in 1744 by Carl Wilhelm Scheele. He combined mineral pyrolusite (manganese dioxide, MnO2) with hydrochloric acid (HCl), and thought that the produced gas has oxygen on it. In 1810, Humphry Davy named and validated Chlorine as a discrete element. Chloride is an essential mineral required for both human and animal. Chloride is an electrolyte which carries negative charged ion, it represents the 70% of the body’s