Fluorine Moissan discovered fluorine in 1886. It is a chemical element with the symbol F‚ atomic number 9‚ 9 electrons and protons‚ 10 neutrons‚ and the atomic mass of 19. Being the lightest halogen‚ it has one stable isotope‚ fluorine 19. At standard pressure and temperature‚ the element is a pale yellow gas as a liquid its a bright yellow. The electrons are located outside the nucleus of the atom. Electrons are organized in such a way that the space between them are inter dispersed. Within this
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electrolyte (conducts electricity weakly) Citric acid should be soluble in water due to the hydrogenbonds etc. it will also conduct electricity since its a weak acid and will dissociate in water (the protons will contribute the most to the conductivity due to the high transport numbers for protons in water). Vinegar (acetic acid) when an acid is in aqueous solution (dissolved in water) there are many loose hydrogen ions (and therefore lots of loose anions as well). Ionic solutions are good conductors
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highly efficient‚ environmentally friendly manner. Although fuel cells were invented one and a half centuries ago‚ only recently has it become feasible for them to compete with existing energy production systems. Among the various types of fuel cells‚ proton exchange membrane (PEM) fuel cells promise to become a viable power source for transportation as well as a distributed power source for residential uses because of their low operating temperatures and high power density. PEM fuel cells also promise
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Part one: The Lab You will be helping Galileo perform the experiment to determine if objects with different mass fall at the same‚ or different‚ rates in the air and in a vacuum. Before you conduct your experiment‚ you need to form a hypothesis. A hypothesis is a prediction of what you think will happen in the experiment. The hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. Record your hypothesis here:
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Synthesis of Methyl Stearate The purpose of this lab was the convert liquid methyl oleate to solid methyl stearate by catalytic hydrogenation. Firstly‚ we produced hydrogen gas using solid mossy zinc and sulfuric acid. Using the hydrogen produced in the previous reaction‚ we were able to convert the liquid methyl oleate to solid crystals of methyl stearate. A mineral oil was also used to bubbler was used to maintain the hydrogen pressure slightly above the atmospheric pressure and to prevent back-diffusion
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Fischer Esterification Kyle Peterson Chem. 243a Matt Judd‚ Sec. 25 Date Performed: 10/15/03 Abstract: The objective of this experiment is to efficiently perform a fischer esterification of 1-Hexanol to form water and hexyl acetate‚ and to confirm the esterification with a nuclear magnetic resonance (NMR) spectroscopy. It was found that 0.3963 grams hexyl acetate was formed with a percent yield of 33.2%. The product was confirmed using NMR‚ IR‚ and boiling point confirmation. Backround: A Fischer
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decay and can transform to two different atoms: Calcium-40 and Argon-40. Approximately 10.72% of beta decay is K-40 transforming to Ar-40 via electron capture. Electron capture occurs when a proton-saturated atom absorbs an electron from the inner shell and thus transforming a positively charged particle (proton) into a neutral particle (neutron). Since lava is liquid‚ any argon-40 gas previously trapped in lava will be able to escape as gas is less dense than liquid. When there is no argon gas in
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And The (Nobel) Award Goes To… Ernest Rutherford was born at Spring Grove near Nelson‚ New Zealand to a farmer named James Rutherford and his wife Martha Thompson. James had immigrated to New Zealand from Perth‚ Scotland to raise a home and a family. Ernest studied at Havelock School then Nelson College where he was studying when he won a scholarship to study at Canterbury College‚ the University of New Zealand. After gaining his Bachelor of Arts‚ Master of Arts‚ and Bachelor of Science Ernest
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Grades K-5 Pencil Electrolysis Introduction: The process by which we separate the elements hydrogen and oxygen from water is called electrolysis. The word "lysis" means to dissolve or break apart‚ so the word "electrolysis" literally means to break something apart (in this case water) using electricity. It is difficult to break up water into it’s elements lots of energy is needed to do that. Through a chemical means though‚ we can separate the compound of water into the elements that combine to
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The element (einsteinium) has the atomic symbol of Es. Its atomic number is 99 while its atomic mass is 252. Einsteinium is located in period 7 of the periodic table as a part of the actinide series. It has 99 protons‚ 99 electrons‚ and 153 neutrons in its atoms. The physical appearance of einsteinium is not known‚ but it is predicted to be metallic and silvery white or grey. Einsteinium is classified as a metal and is a solid at room temperature. It has a melting point of 860°C and an atomic radius
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