Technetium is a silver-gray radioactive element and it is located in the D-block with an atomic number of 43. Most of the Tc-99 is produced synthetically, where natural occurrences of the element are rarely formed by fission in uranium in the crust of the earth. Tc-99 is the most common isotope with a radioactive half-life of 212,000 years and it can mainly be found in nuclear reactors.
Technetium was originally discovered by three german chemists, Ida Noddack-Tacke, Walter Noddack and Otto Berg, whom had published an article stating the discovery of “Masurium” in 1925, however at the given time because they were unable to verify the existence of “Masurium,” the International Union of Pure and Applied Chemistry excluded their discovery. It was believed that Masurium was presumably Technetium due to the chemical properties and atomic number being very similar. Technetium was later discovered and proved in the form of Technetium-97 by two assistant researches of University of California in Berkeley, Emilio Segre and Carlo Perrier. In 1937 the discovery originated from a sample of mol...
After several new product failures, the company began using customer input to help develop new products. In 1989, the fishing electronics industry is experiencing a downturn, and the company's sales and profits are slipping. The company, which has one product line (depth sounders) and a strong brand (Hummingbird), has conducted substantial market research on three new products. These products are project 901, hummingbird VHF Radio, Locator/ GPS navigator. Of these, project 901 is an extension of the depth sounder product, while the other two would be new product lines for the company. Top management is deciding which one or more of the three new products it should proceed with. In this paper, I will discuss the positive and negative aspects of each product ideas and my recommendations to Techsonic management
achieved by Rutherford, has led to the creation of elements not found in nature; in work
“Class,” I announced, “today I will teach you a simpler method to find the greatest common factor and the least common multiple of a set of numbers.” In fifth grade, my teacher asked if anyone had any other methods to find the greatest common factor of two numbers. I volunteered, and soon the entire class, and teacher, was using my method to solve problems. Teaching my class as a fifth grader inspired me to teach others how important math and science is. These days, I enjoy helping my friends with their math homework, knowing that I am helping them understand the concept and improve their grades.
Isotopes refer to 1 of 2 or more atoms with the same atomic number but different numbers of neutrons. The atom copper has two stable isotopes. They are 63Cu and 65Cu. 63Cu has an isotope atomic mass (in atom) of 62.9295989 and a natural abundance (in atom %) of 69.17. 65Cu has an isotope atomic mass (in atom) of 64.9277929 and a natural abundance (in atom %) of 30.83.
A. As Human Resources Director for Techfite’s new location in Dellberg, I feel it is necessary to implement policies that reflect and maintain our company culture of workplace collaboration and leadership development. In an effort to also encourage employee empowerment and engagement in corporate decision making, I propose the following corporate policies that reflect a virtue-based perspective of ethics, be implemented immediately.
Mr. Cronstedt discovered nickel in a mineral called niccolite. He originally planned to extract copper from this new mineral but got none at all. This is why nickel, at first, was called "false copper". Instead, Cronstedt got a silvery-white metal, which was eventually used for other things.
Technology, what is it? It’s usually something new, and better than the old idea. Technology started with cars, stoves, TV, radios, etc. Cars takes somebody from one place to another, faster than walking, running, or biking and one could go places without getting tired. Stoves allowed one to conveniently be able to turn on and off heat to a cooking utensil with less clean up. The biggest contributor to making our lives easier would be computers, which has come a long way since its introduction to the world. Also, computers have the ability to be improved more, and more in time. In general, technology started off by comforting our lives. Now, the rapid growth of technology has replaced the need for one’s own intellect.
early 1990’s, no such material was known. In 1991, carbon nanotubes were discovered. Although not
In 1817, an aging Swedish chemist was pouring over his work on a late afternoon in Stockholm, Sweden. He was analyzing a strange ore named Petalite that had been procured from an island off the coast of Sweden called Utö. The ore Petalite (which is now recognized to be LiAl(Si2O5)2) had been discovered by a Brazilian scientist, José Bonifácio de Andrada e Silva towards the end of the 18th century on a visit to Sweden. This Swedish scientist, Johann August Arfvedson, detected traces of an unknown substance in his sample of Petalite. This was the first discovery of Lithium.
Commedia dell’ Arte also knows as the “Comedy of Art” or “Comedy of the profession”. This was most commonly used in Italy between the 16th and the 18th century. It spread and was a great success in lots of other places in Europe such as France England most of west of Europe.Commedia dell Arte brought all sorts of actors such as street actors, because before they needed people that were literate now they could have illiterate people doing improvisation. This is when the comedians act, but nothing is prepared in advanced. All that was prepared was the title of the play and the relation between the characters and the scenario which was a couple of pages long, but the play was much longer. Like all theater, it was divided into acts and scenes
...e also realized that an adenine-thymine pair with two hydrogen bonds was identical in shape to a guanine-cytosine pair with two hydrogen bonds. This opened up the possibility of A-T and G-C pairs, rather than pairs of identical bases. Using Pauling’s ignorance of his mistake to their advantage, Watson and Crick rushed to put the metal model together and write a paper to be published in Nature so they could beat Pauling to the answer. Although they had been exceedingly cautious not to get ahead of themselves and publish a premature manuscript that would later turn out to have a major fault, they now felt they had enough evidence to confidently publish their findings. Indeed, a few days later, they sent the manuscript to the scientific journal with a strong cover letter from Bragg and their research was soon thereafter published, changing the scientific world forever.
The Computron, Inc. is facing problems regarding pricing the bid for Computron 1000X, future functioning of Frankfurt plant, impact on production due to current market breakdown.
Scientists from earlier times helped influence the discoveries that lead to the development of atomic energy. In the late 1800’s, Dalton created the Atomic Theory which explains atoms, elements and compounds (Henderson 1). This was important to the study of and understanding of atoms to future scientists. The Atomic Theory was a list of scientific laws regarding atoms and their potential abilities. Roentagen, used Dalton’s findings and discovered x-rays which could pass through solid objects (Henderson 1). Although he did not discover radiation from the x-rays, he did help lay the foundations for electromagnetic waves. Shortly after Roentagen’s findings, J.J. Thompson discovered the electron which was responsible for defining the atom’s characteristics (Henderson 2). The electron helped scientists uncover why an atom responds to reactions the way it does and how it received its “personality”. Dalton’s, Roentagen’s and Thompson’s findings helped guide other scientists to discovering the uses of atomic energy and reactions. Such applications were discovered in the early 1900’s by using Einstein’s equation, which stated that if a chain reaction occurred, cheap, reliable energy could b...
As Tektronix decided to implement the new Oracle ERP system, the company chose to introduce it in phases, based around the specific functionality or a particular geographic region. Implementing in phases, or in waves as Tektronix called it, allowed the company to experience regular feedback on specific areas of implementation, allowing time to adjust processes and scheduling as needed. The phased approach enabled the company to achieve frequent victories, which kept team and employee morale high throughout the process and provided encouragement to the Board despite the high cost and long timeline of the overall implementation.
The symbol of technetium is Tc and the name of the element originates from the Greek word technetos which means artificial. It’s atomic number is 43 and it has 43 protons and electrons. The element has a total of 55 neutrons and has an atomic mass of 98 u. Technetium is in period 5 and group 7 of the periodic table. It has a melting point of 3,915 degrees Fahrenheit while it’s boiling point is about 4,000 degrees higher at 7,709 degrees Fahrenheit. Technetium is classified as a transition metal and has a density of 11g cm^-3. The element is a solid, but can also be used in other forms, as technetium 99 is used in its liquid form. The element usually has silvery-grayish metallic color. The Technetium element was the first to be synthetically