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  • The Effects Of High Organature Proton Exchange Fuel Cells

    High temperature proton exchange membrane fuel cells (HT-PEMFCs) are a promising clean technology, especially for automobile applications.1 These devices generate electricity from the chemical reactions that occur in the anode side of the cell, using H2 as a fuel and generating heat and water as by-products.2, 3 However, experimental studies using HT-PEMFCs show that degradation of the cell can occur after certain hours of operation (around 500 hours).4 Some of the factors that contribute to the degradation of the HT-PEMFCs are rupture of the bulk polymer backbone of the membrane, H3PO4 loss and poisoning of the catalyst layer.5 These degradation problems must be overcome in order to commercialize this type of fuel cells.5 Consequently, extensive…

    Words: 1485 - Pages: 6
  • Radioisotopes Research Paper

    unstable combination of neutrons and protons. All elements which have their atomic numbers greater than 83 are radioisotopes and have unstable, radioactive nuclei. They have at least one stable isotope and one unstable isotope. In order to gain stable conformation the nucleus of the atoms loses a neutron due to which radiation energy is given off and the atom is said to be in radioactive state. They are also called as radionuclides because they have more nuclear energy. These atoms are occur…

    Words: 1456 - Pages: 6
  • Analysis Of Henry Moseley's 'Completing The Table With A Bang'

    gap. This caused collisions, which was able to produce an X-ray wave. Using his observations, Moseley was able to conclude that there was a relationship between the number of protons, the wavelength of the X-ray, and the atomic number. Before this, atomic numbers were used without any particular meaning, just to represent the order of elements on the periodic table. Now, because of Moseley, people understand that the atomic number corresponds to the number of protons in the nucleus. Moseley was…

    Words: 1185 - Pages: 5
  • Fundamental Features Of Atom Research Paper

    matter which cannot be broken down any further .an atom consist of sub atomic particles which are protons, neutrons and electrons .I will be looking at specifically the atom lead. Every element in the Periodic Table has been given a letter symbol , the symbol for lead is Pb.i will now describe the sub atomic particle in lead .protons are in the nucleus of the atom , All atoms of the same element have the same number of protons. This number…

    Words: 948 - Pages: 4
  • The Five Major Components Of The Atomic Theory

    nucleus, known as the proton. This discovery then rearranged the periodic table by atomic number rather than atomic mass. In 1927, Werner Heisenberg introduced the uncertainty principle, which states that the more precisely the position of a particle is determined, the less likely it’s momentum can be known, and vice versa. Lastly, in 1932, James Chadwick discovered the neutron, which is the neutrally charged particle in the nucleus. The modern view of the atomic structure is that the…

    Words: 1474 - Pages: 6
  • Chemistry Chapter 11 Summary

    Chapter 11, “The Chemical Elements”, was of great interest to me. “Chemistry is the study is the study of the composition and structure of matter (anything that has mass) and the chemical reactions by which substances are changed into other substances (James T. Shipman 285).” In this summary paper, I will discuss some of the highlights of the chapter. The way I see it, God is the original/first chemist. He took His own creations (the elements in our Periodic Table) to make provisions for…

    Words: 336 - Pages: 2
  • Thomson's Gold Foil Experiment

    This idea helped him develop the nuclear theory of the atom, which has three (3) basic parts:More work by Rutherford and others that wad completed later on demonstrated that the atom's nucleus contains both positively charged protons and…

    Words: 374 - Pages: 2
  • The Atomic Theory

    noted for the discovery of this, which was named neutrons.. Rutherford also concluded that most of the atom was made up of empty space. Later on in his career, he discovered protons, written as p+, using much of the same process as he did to discover the nucleus. Two years later in 1911, Niels Bohr traveled to England to study with Rutherford. Because Bohr was a physicist, he was also interested in the mathematical model that Max Planck and Albert Einstein had set forth at that time. This…

    Words: 1526 - Pages: 7
  • Atom Dbq Essay

    People find out new things about the world every day. Scientific findings are almost never final. Experiments can verify or shatter what we perceive as facts of life. Atoms are an example of this. Thinkers and scientists from throughout time have been theorizing and experimenting to find out what an atom is made of. The structure of an atom is very complex, and because of that, its known structure has drastically changed over time. What we know as an atom today is composed of many subatomic…

    Words: 410 - Pages: 2
  • Negative Effects Of Carbon 14 Isotope

    An Isotope is an atom of an element which has a different number of neutrons and different mass number but the same proton number. The isotope that will be focused in the essay is carbon 14 isotope. Carbon is found in all living things and is the building block for organic material, there is carbon 12, 13 and 14 and they all have different properties. This isotope was discovered on February 27, 1940 by Martin Karmen and Sam Ruben and is the most radioactive out of all carbon isotopes. The…

    Words: 1020 - Pages: 5
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