History of the Atomic Model Just as we once believed that the earth was flat‚ our understanding of the atom was once extremely limited. As time passes‚ we begin to discover more and more about the world we live in. We have come to know much about the atom over the past two hundred years through the work of numerous brilliant scientists. Throughout history‚ scientists have come up with many experiments and atomic models to explain the atoms all around us‚ all leading up to our modern understanding
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The History of Atomic Theory Atomos: Not to Be Cut The atomic model has changed throughout the centuries starting in 400 BC‚ when it looked like a billiard ball. Democritus: 400 BC The question: Can matter be divided into smaller particles? Or can it be infinitely divided? Matter can be divided into the smallest piece‚he named it “atomos”: not to be cut. Said that atoms were small‚ hard particles that were all made of the same material but were different shapes and sizes. Atoms were
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Tellurium Many historians believed that Franz Joseph Müller von Reichstein was born around 1740’s to 1742 in the Habsburg Empire‚ which later became known as the Austro-Hungary Empire. Müller had many different positions in the Austria-Hungary administration; but he’s most known for being a mineralogist and skilled miner. He started his rode to success by becoming a Markscheider (official mine surveyor)‚ which then lead him to become an Hüttenwerke (royal commission for mining in the Banat). These
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Participating in weight training has taught me many things about the importance of maintaining a healthy lifestyle and ways to keep a fit body. As I progressed over the semester I began to set future fitness goals for myself. My goals are to build more muscle in my arms and abdominal area‚ increase endurance aerobically and adjust to a healthier diet. To build more muscle‚ I will eat more protein (meat‚ eggs‚ beans‚ and nuts) and gradually use heavier weights as I progress. To increase my endurance
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ATOMIC STRUCTURE AND THE PERIODIC TABLE Theoretical change with respect to Dalton’s atomic theory 1. In 1803‚ atomic theory was revived by John Dalton a) matter is made up of tiny particles called atoms which cannot be created‚ destroyed or split b) all atoms of one element are identical:- same mass and same chemical properties c) a chemical reaction consists of rearranging atoms from one combination to another. d) When elements combine to form compounds‚ small whole numbers of atoms
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June 2011 An Intangible Weight to Carry In an excerpt from Tim O’Brien’s The Things They Carried‚ O’Brien acquaints us with a story of a group of soldiers in the Vietnam War enduring extreme physical and mental circumstances. He goes to vast lengths to describe the tangible difficulties these men must face while linking us to the mental anguish. This story is a beautiful account of love and the lack thereof‚ pain and tragedy‚ imagination and reality‚ and all the weight of burdens carried throughout
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Dalton‚ English chemist: • Proposed the atomic patterns‚ which account for the law of conservation of mass and the law of constant composition • All matter is made of atoms; atoms of an element are identical; each element has different atoms; atoms of different elements combine in constant ratios to form compounds; atoms are rearranged in reactions. • “Billiard ball’ model – atoms are solid and indivisible THE ATOMIC THEORY TIMELINE 500 B.C Greek philosophes
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11-13-13 Yaroslav Luchko 611 Health Homework The Weight of the nation #5 The movie we watched is called “The weight of the nation”. I learned that: >Worldwide obesity has nearly doubled since 1980. In 2008‚ more than 1.4 billion adults‚ 20 and older‚ were overweight. Of these over 200 million men and nearly 300 million women were obese. >35% of
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Lab: investigating hooked law with springs Purpose: to find spring constants of different springs using the slope of a graph of change in heights vs. the weight force. Also‚ to be able to understand how spring constants change when you add springs in a series or paralle Pre lab predictions: We predicted that the graph of gravitational force (mg) as a function of stretch (delta x) would look like Data: Spring #1: y = 8.2941x + 0.0685 This table represents the different distances that
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Hiroshima: Was Dropping the Atomic Bomb a Military Necessity? On the morning of August 6th‚ 1945 at around 8:16 a.m.‚ the United States dropped the first bomb on Hiroshima. This bomb was given the nickname “Little Boy.” Three days after the first atomic bomb was dropped‚ on August 9th‚ 1945 at around 11:02 a.m.‚ the United States dropped a second atomic bomb on Nagasaki. This bomb was given the nickname “Fat Man.” These two bombs immensely destroyed these cities and took the lives of many people
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