Atomic Theory

The history of the atom
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Over the span of hundreds of years science has advanced tremendously improving our understanding of what makes up the world we live in. The atom is one of sciences important findings and has had a changing history of new discoveries, always altering the way we see things. In the early 1800s a man called John Dalton made an atomic theory with predictions about atoms. He stated that atoms are tiny particles that make up elements and that they are indivisible.…...
Brief History of the atom model
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The roots of atomic theory can be traced back over 2000 years ago to the ancient Greeks. The Greeks were responsible for many advancements in civilization, but one of the things that drove them was the question of origin. Who are we? What are we made of? Where did we come from? These questions were not limited to humans, but to all matter in the world. Around 400 BC a philosopher named Democritus proposed a theory of composition of matter.…...
Uses Of Nuclear Energy While Bombing Nagasaki
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A description of the nuclear bomb attack on Nagasaki on July 16 1945 The year was 1945. The war in the Pacific had reached it's climax with the attack on Pearl Harbor, or so the world thought! In 1943 a new era was just being discovered when Albert Einstein had uncovered a new way of destroying things. One so powerful it could wipe out entire cities in seconds. When Albert told the president of the U.S.A. he had no idea…...
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Atomic Theory Timeline
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Atomos Democratus, 460 b.c. Billiard Ball Model John Dalton, 1808 Plum Pudding Model J.J. Thomson, 1904 Planetarium Model Ernest Rutherford, 1911 Bohr Model Niel Bohr, 1913 Refined Bohr Model Niel Bohr, 1920's Electron Cloud Model Erwin Schrödinger, 1930's New Quantum Model Albert Einstein, 1930's...
Chemistry Exam 3 (Atomic Theory)
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The wavelength of some green light is 530.0 nm. What is the frequency of this green light? 5.66 x 10^14 hz Microwave radiation vs. UV radiation Which has a longer wavelength? Which has a greater frequency? Which has greater energy? Microwave UV UV Microwave ovens emit microwave energy with a wavelength of 12.1 cm. What is the energy of exactly one photon of this microwave radiation? 1.66 x 10 ^-24 J A certain shade of blue has frequency of 7.32…...
General Science II Module 1 Test
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Sir Isaac Newton supported the Biblical accounted of Creation True People were created by God as an extremely intelligent being True Aristotle was a Renaissance scientist False LaMarack thought that acquired characteristics could be inherited True The cotton gin was a great invention for food production False Technology is applied science True Technology applies the principles of science to particular problems True Philosophy is not considered science because it lacks: experimentation The astronomer who agreed with the heliocentric theory and…...
Bean Bag Isotope: Abundance and Atomic Mass Lab
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A new atomic theory, in which all atoms of the same element are identical to one another and equal in mass, was proposed by the scientist Dalton. Although the theory had its flaws and was simple, it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon, isotopes were discovered, as atoms of the same element which have been built up to have different masses. Purpose The purpose of this…...
Empirical Formula Lab Report
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INTRODUCTION John Dalton’s atomic theory states that elements combine in simple numerical ratios to form compounds. A compound, no matter how it is formed, always contains the same elements in the same proportion by weight. The law of mass conservation states that mass can neither be created nor destroyed. In this experiment, the mass of the metal was not destroyed or created; the metal’s mass was simply changed into a compound form once the gas reacted to it. The net…...
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