Determination of Trace Amount of Copper and Zinc in an Aqueous Solution by Atomic Absorbance Spectroscopy Abstract: The purpose of this experiment is to analyze a sample containing copper and zinc in trace amounts‚ where standard addition method was used and the instrument used is the atomic absorbance spectroscopy. The amount of copper obtained was 0.569 ppm ± 0.015 and for zinc we obtained 0.42 ppm ± 0.0027. Introduction: This method implies the excitation of particles in the solution sample
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think about how this war really ended? It obviously had to have taken a very powerful army or leader‚ but that wasn’t the case. What really caused this national turmoil to come to an end was the dropping of the most deadly weapon known to mankind: the atomic bomb. The year is 1939‚ and a world war is on the rise. America really wanted to create a weapon that they could use if worse comes to worse. Albert EInstein had written
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Atomic Spectra Lab Purpose: The purpose of this lab was to identify the wave length and spectra of the two elements‚ mercury and hydrogen. The wavelengths of the two elements represent the characteristic energies of moving electrons. The spectra of the two elements are what side of the energy spectrum their wavelengths are on. Materials: • Hydrogen lamp • Mercury lamp • 2 diffraction devices • Flashlight • Paper • Pencil • Calculator Procedure: 1. Place
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Atomic War or Peace? Was the dropping of the atomic bomb on Japan justified? Many people believe that it was very justified‚ but was it? Some reasons could have been the attack on Pearl Harbor‚ the destruction of Japans power to make war‚ also what seemed to the only answer to end war. “I wouldn’t hesitate if I had the choice. I’d wipe ‘em out. You’re gonna kill millions of innocent people‚ but at the same time we’ve never fought a war anywhere in the world where they haven’t fought and killed
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Atomic Structure & Electricity 1. Draw an atom with an atomic number of 12. Label the protons‚ neutrons‚ and electrons. Use the periodic table to identify which atom you have drawn. 2. How many valence electrons are present in this atom? 2 3. Would this atom prefer to gain or lose electrons? Why? Lose‚ because the octet rule dictates that if there is less than 4 valance electrons‚ they would prefer to leave the atom. 4. Describe the differences between conductors‚ semiconductors
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VISIBLE SPECTROPHOTOMETER INTRODUCTION In chemistry‚ spectrophotometry is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength. It is more specific than the general term electromagnetic spectroscopy in that spectrophotometry deals with visible light‚ near-ultraviolet‚ and near-infrared‚ but does not cover time-resolved spectroscopic techniques. Spectrophotometry involves the use of a spectrophotometer. A spectrophotometer is a photometer
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light‚ travels in wavelengths and is measured in nanometres (nm). Pigments within matter‚ such as plants‚ absorb varying wavelengths of light. The absorption spectrum can be defined as a graphical representation of a pigment’s ability to absorb light against varying wavelengths (nm). The pigments light absorbing ability is measured using a spectrophotometer. An action spectrum can be defined as the graphical representation of the rate of photosynthesis against wavelengths of light. The graph shows
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PGTP Karachi Institute of Power Engineering (KINPOE) -CHASNUPP Centre of Nuclear Training (CHASCENT) PAKISTAN ATOMIC ENERGY COMMISSION P.O. BOX NO. 3183‚ Paradise Point‚ Hawks Bay Road‚ Karachi Phone: 021-99202222 Ext: 2701 Fax: 021-99202240 E-mail: pgtp@kinpoe.edu.pk Website: www.kinpoe.edu.pk APPLICATION FORM - 2010 Post Graduate Training Program (Nuclear Technology) at CHASCENT (Mianwali) and KINPOE (Karachi) (Read instruction before filling the form) Roll NO. __________________
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Sir J.J.THOMSOM is to physics what electron is to an atom. He charged the world of physics with his discoveries and gave momentum to atomic physics. Physics is what today because of this British scientist who is regarded as the greatest experimental physicists of this century. A bookseller’s son‚ Thomsom studied at the Owens College and later at the Manchester University. He wanted to become an engineer‚ but his father’s death in 1872 forced him to study Mathematics‚ Physics and Chemistry as he
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Integrated Physics and Chemistry – Unit 2: The Structure of Matter Experiment: Atomic Structure In this experiment‚ you will have a chance to test the hypothesis that Ernest Rutherford used when determining the size of the nucleus. In his "gold foil experiment‚" Rutherford shot alpha particles at gold atoms. Once he realized that the alpha particles were hitting a concentrated positive mass‚ he developed the nuclear model of the atom. Next‚ he set out to determine the relative size of the nucleus
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