table, there are a few that stand out because of certain characteristics, Gallium is one of these elements. On the periodic table, Gallium has the symbol Ga and atomic number 31. Gallium is a metal that has uses in such things as, medical, industrial, and everyday life. Gallium is a metal that was discovered in 1875 by Paul Emile Lecoq De Boisbaudren and is a “byproduct of the manufacture of aluminum” (“Gallium.” Web). Gallium has a low melting point of 29.76°c which is just slightly above room temperature
Dmitri Mendeleev was a Russian chemist that made many breakthroughs is science. He is mostly known for creating the periodic table. Mendeleev’s work is still used today worldwide. Most of Mendeleev’s life was a struggle but he overcame all of them to become one of the world’s greatest scientists Dmitri Ivanovich Mendeleev was born on February 8 1834 in the small village of Verckhine right outside of Siberia. His parents were Ivan and Maria Mendeleev. Dmitri had between eleven and seventeen
The earliest known gallstone dates back to the twenty-first Egyptian Dynasty sometime between 1085-945 B.C., that was discovered in the mummy of a priestess of Amen. This ancient specimen was destroyed, unfortunately, in the bombing of England during World War Two. Gallstones or cholelithiasis were first described and further researched in the fifth century by the Greek physician named Alexander Trallianus. Trallianus wrote about stones within the bile ducts. Trallianus wrote about stones in the
Gallium? What is that? Well I will get to that but first let me tell you why I chose to research the element known as gallium. I became interested in gallium after YouTube suggested that I watch videos about gallium. Then as I watched I learned that gallium; a post-transition metal, will turn into a liquid as soon as a person touches it. Cool right? That's exactly what I thought. I found it extremely odd. Usually metals are widely known to have intense strength and can bare a lot of heat and beating
Gallium is a chemical element with the symbol Ga. Gallium is a soft silvery blue at standard temperature and pressure, it's a brittle solid at low temperature. Gallium is a non-toxic chemical for humans, gallium is used to make a thermometer. most of us use gallium for an everyday thing, they are used to make mobile phones, optoelectronics, solar panels, and LEDs. It is used for mining a mining tool, the thing they mind for with gallium is aluminum and zinc. Gallium is not found in its element from
McMillan created the first artificial element - Neptunium. Over the 25 years Glenn Seabory, of the University of California at Berkeleydiscovered an entire family of new elements, 94 to 102. Specimen References: *1-*3, *6-*9; Article 1 Gallium: a landmark in the history of chemistry *4; http://www.unodc.org/images/odccp/bulletin/bulletin_1954-01-01_3_page005_img005_large.gif *5; Absorption Spectrum, page 125, SAC Chemical Ideas, George Burton et al, Heinemann, 2000. *11 www
Nuclear medicine is the use of radioactive substances in the diagnosis and treatment of disease. Nuclear medicine records the radiation that is emitting from the body, unlike x-rays which determine the radiation emitted by external objects. Nuclear medicine scans show the function of anatomy and are known as a physiological imaging modality. The two most common forms of nuclear medicine are “SPECT” single photon emission computed tomography and “PET” positron emission tomography. In nuclear medicine
Non-renewable energy sources such as fossil fuels and nuclear ores have a rate of replenishment on the order of millions of years. These are currently being used at a rate significantly greater than that of replenishment. Consequently, there is a finite reserve of non-renewable energy sources, and once these reserves have been emptied, alternative sources of energy must be used. Renewable energy sources replenish at a rate greater than they are consumed. Renewable energy sources include solar energy
once the transition temperature of these materials reaches well beyond room temperature. An overview of semiconductor spintronics has been presented here: • GaMnAs based heterostructures: It was observed that highly coherent tunneling occurs in Gallium Manganese Arsenide(GaMnAs) based heterostructures, when the GaMnAs quantum-well thickness was varied from 3.8 to 20 nm. To observe resonant tunneling in this system, it was found that the Fermi level of the electrode injecting carriers is important
of hundreds of semiconductors. Semiconductors also could be found in nature like zinc selenide (ZnS), cuprite (CU2O) and galend (PbS). Semiconductors are classified in numerous ways. They exist as pure elements such as Si, B and compounds such as gallium arsenide. Semiconductors could also be categorized as Elemental, Binary and Ternary. • Elemental Semiconductors: These are single elemental semiconductors belong to B subgroups III, IV, V and VI groups of the periodic table. Carbon (diamond) Silicon
primarily used as a result of their relatively light weight and heat conduction properties (Wittry, 2005). In 2001, two 38ft x 239ft solar panels were installed on the ISS. The new cells were multi junction solar cells comprised of gallium indium phosphate on gallium arsenide on germanium. The germanium based cell resists oxidation, unlike its silicon oxide counterpart that experienced degradation in the upper atmosphere due to exposure to oxygen (Wiebusch, 2001). Furthermore, the Silicon based solar
Police Radar Guns and Jammers Since Radar’s first use in 1937 by Watson-Watt, where they detected the motion of flying objects by calculating the difference in the signals emitted and received, Radars have been used in various occasion (Crochi). After laser was invented, the modern LIDAR system was used in such missions as the Apollo 15 to help draw moon’s map. Apart from its pervasive use in naval and aerial object detection, the modern technologies, based on the principle of Radar’s working mechanism
1. Johann Dobereiner • 1817-1829 Dobereiner began to cluster elements with similar properties into groups of three also known as triads. • Law of Triads- Began in 1817 when Dobereiner noticed the atomic weight of strontium, Sr, was midway between the weights of calcium and barium. These elements also had similar chemical properties. • In 1829 Dobereiner had discovered the halogen triad (chlorine, bromine and iodine) and an alkali metal triad (lithium, sodium and potassium). He proposed that
Specific Purpose Statement: To persuade my audience that that solar power should become the main form of alternative energy in the Unites States. Introduction: Attention Getter: Let’s look ahead fifty years and see what the world is like. Imagine a world that is in total war with no end in sight. The cause behind this war is simple, oil. Everyone is fighting over those last few reserves of oil. How can this future be prevented? The answer is solar power. Claim: Solar power has the potential
Dmitri Ivanovich Mendeleev was born on February 7, 1834. He was the youngest of 14 children and the favorite of all. Mendeleev was provided as many opportunities that his mother could afford. When he was young he spent many hours in the glass factory his mother operated, learning from the chemist, who influenced him, about the concepts behind glass making and from the glass blower about the art of making glass. Another great influence in his life was Bessargin, his sister’s husband. Bessargin occupied
small amounts of Indium are occasionally added to gold or platinum alloys to make them harder. It is also added to solders*, it reduces the melting point of some and strengthens others; it also prevents other solders from breaking down easily. Indium Gallium Arsenide (InGaAs) is able to convert pulses of light into electrical signals. In 1997 Copper Indium Diselinide (CuInSe2) was used in the most advanced solar conversion systems solar cells. At high temperatures Indium combines with Oxygen to form Indium
The amazing thing about renewable energy resources is that they do not deplete. These energy resources include energies such as hydroelectric energy, solar energy, wind energy, and geothermal energy. The major advantage of using these resources is that the environmental impact is extremely low when compared to the use of fossil fuels and other energy processes. One of the most used renewable energy sources is hydroelectric power. When you look at all the environmental impacts of dams, etc., they
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
The Periodic Table is one of the most recognisable and valuable scientific resources. With over 100 elements, each with different physical and chemical properties, the discovery of the periodic system has been one of the most important discoveries in the history of science. The first element, phosphorus, was discovered in the 17th century1. There have been numerous discoveries that have developed the Periodic Table. Humans have been aware of elements for thousands of years; the ancient elements were
1. Problem definition 1.1. What is E-waste E-waste, or "Electronic waste", includes discarded computers, electronic equipments, entertainment consoles, mobile phones, televisions and many more. It comprises used electronics for reuse, resale, salvage, recycling, or disposal purposes. 1.2. Amount of E-waste Rapid changes in technology and falling prices have resulted in a fast-growing surplus of electronic waste around the globe. An estimate of 50 million tons of E-waste is produced each year (Sthiannopkao