Chemistry * a science that dealing with the structure‚ composition and properties of items and with the transformations that they undergo * the composition and chemical properties of a substance * chemical processes and phenomena (as of an organism) Examples: - Digestion; enzymes promoting chemical reactions that power our bodies. Lifting your arm requires your body to make and burn ATP using oxygen with carbon dioxide as one of the waste gases produced. - The internal combustion
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Science Holiday Homework Aldo 10D The Rutherford’s Experiment and the Geiger Marsden experiment were both the same experiment‚ where Rutherford being the mentor of Geiger and Marsden in the investigation of the experiment at the University of Manchester in 1909. The experiment was so important because it changes our view and understanding upon the structure of the atom. Before Rutherford‚ there was a man named Joseph John Thomson who proposed the structure of the atom. He stated that the electrons
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of protons. Because the plot shows only the stable isotopes‚ this graph is often called the Nuclear Belt of Stability. The plot indicates that lighter nuclides (isotopes) are most stable when the neutron/proton ratio is 1/1. This is the case with any nucleus that has up to 20 protons. As the atomic number increases beyond 20‚ a different trend becomes apparent. In this range‚ it appears that a stable nucleus is able to accommodate more neutrons. Stable isotopes have a higher neutron to proton ratio
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of a strong electrolyte Brønsted-Lowry theory Acid is a proton donor Base is a proton acceptor H2O + HNO2 H3O+ + NO2- The conjugate base of the acid HNO2 is nitrite ion. The conjugate acid of water is the hydrated proton written as H3O+ Amphiprotic solvent – solvent that can act either as an acid or as a base‚ a classic example is water. The weakest acid forms the strongest conjugate base The tendency of a solvent to accept or donate protons determines the strength of a solute acid or base dissolved
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NMR Project Sample 35 and 40 Chemical Engineering Chemical Analysis Aim The two samples are 35 and 40. Analytical techniques are vital in everyday science and so NMR procedure is an absolute essential to deduce compounds and chemical structures; this assignment requires the identification of two samples using an NMR software program. Background NMR spectroscopy is a well established method for structure determination of various organic molecules ranging from small molecules all the
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Atomic nuclei consist of protons and neutrons‚ which have a positive or negative charge. Electric forces are repulsive between similar charges‚ so there must be a force much stronger than electromagnetism keeping them together. This force is called the Strong Nuclear Force‚ and it is about a hundred times stronger than the electromagnetic force. Its strength allows it to hold a nucleus together‚ despite the desire of the electromagnetic force to thrust it apart. Despite its relative strength‚ the
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conductor than copper‚ which has four orbits. Silver is often used as a coating on electrical conductors in order to keep the resistance as low as possible. Now‚ let’s look at an atom of carbon (Figure 7). The nucleus of the carbon atom contains six protons and six neutrons. Six electrons orbit the nucleus. Now‚ look more closely at the electrons. Note that the electrons orbit the nucleus in two rings‚ or shells. The inner shell 8 Nature of Electricity 47P 61N 29P 35N Single electron in outermost
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same type of nucleolus (P-P) or (N-N). this force demand the same spin & orbital angular momentum. The exchange interaction in produced by only a neutral meson. The involving mesons without electric charge‚ that it gives exchanges forces between proton & Neutron & also therefore maintains charge in dependence character. It is evident for the nature of the products that neutral mesons decay by strong & weak interaction both. It means that neutral mesons constituents responsible for the electromagnetic
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over 90o their results revealed the presence of atomic nucleus and led to Rutherfords atomic model.3 FORCE OF THE NUCLEUS The strong nuclear force is an attractive force that acts between all nucleus protons and neutrons alike. Thus protons attract each other via force at the same time they repel each other via the electric force‚ nuclei are bound together by the residual strong force‚ the Mesidual strongforce is minor medium of the strong force which
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Matthew Rose Mr. Schwartz Chemistry 8 March 2011 Ernest Rutherford Ernest Rutherford was one of the most famous physicists of the early 20th century. He won the Nobel Prize in chemistry in 1908 for his work on atomic emissions and his contributions that led to the discovery of atomic fission. Ernest Rutherford was born in Nelson‚ New Zealand on August 30‚ 1871. His father was James Rutherford and his Mother was Martha Thompson. His father was a wheelwright‚ a person who builds and repairs
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