The Atomic Model has changed over time‚ as the years‚ decades‚ and centuries go by we get a better understanding of the atom and what it looks like. The Atomic Model has changed drastically based on the understanding we have on it‚ each new model has added more information to what we know about it‚ making it easier for scientists and the world to understand. The Atomic Model is a very important part of Science and Chemistry‚ it helps explain the structure and what is inside the atom‚ the particle
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The proton is a subatomic particle with the symbol p or p+ and a positive electric charge of 1 elementary charge. The name proton was given to the hydrogen nucleus by Ernest Rutherford in 1920. The concept of a hydrogen-like particle as a constituent of other atoms was developed over a long period. As early as 1815‚ William Proust proposed that all atoms are composed of hydrogen atoms‚ based on a simplistic interpretation of early values of atomic weights ‚ which was disproved when more accurate
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Rutherford’s Gold Foil Experiment Rutherford started his scientific career with much success in local schools leading to a scholarship to Nelson College. After achieving more academic honors at Nelson College‚ Rutherford moved on to Cambridge University’s Cavendish laboratory. There he was lead by his mentor J.J. Thomson convinced him to study radiation. By 1889 Rutherford was ready to earn a living and sought a job. With Thomson’s recommendation McGill University in Montreal accepted
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Pentaquarks Elusive or Non-existent? Pentaquarks‚ Elusive or Non-existent? Outline: Beginning in 2003‚ scientists claim to have experimental evidence of a five-quark combination‚ and it is now being called a pentaquark. Pentaquarks are postulated subatomic particles consisting of four quarks and one antiquart. Scientists that have done research believe it to exist; others are doubtful skeptics that are against its existence. I. Introduction of Pentaquarks A. Definition B
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The Rutherford Model of the Atom 1. In 1911 Rutherford proposed the nuclear model of atomic structure. He suggested that an atom consists of a central nucleus (where most of the mass of the atom is concentrated) having a positive charge‚ surrounded by moving electrons carrying negative charge. Geiger and Marsden carried out an experiment to verify his proposal. The Geiger/Marsden a Particle Scattering Experiment 1. The apparatus is illustrated in the diagram below. | 2. The apparatus
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Albert Einstein is a very influential role model. Albert Einstein wasn’t only a scientist who discovered relativity‚ and made the equation E= mc2‚ he was an intelligent man who wanted to know how everything worked. Albert Einstein achieved many goals in life. Albert Einstein has won many awards because of is accomplishments. Albert Einstein was born March 14‚ 1879 in Ulm Germany. He was raised in Ulm‚ Germany but six years after he was born he moved to Munich‚ Germany. Albert began going to school
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Name ___________________________ Chapter 4 Class ___________________ Date _____________ Atomic Structure Section 4.1 Studying Atoms (pages 100-105) This section discusses the development of atomic models. Reading Strategy (page 100) Summarizing As you read‚ complete the table about atomic models. For more information on this Reading Strategy‚ see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. Atomic Models Scientist Evidence
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Bismuth was discovered in the fifteenth century by a french chemist named Claude Geoffroy the Younger. At first his colleagues thought he was crazy‚ thinking that he had found lead or tin. But Geoffroy had distinguished it as a unique element. The name Bismuth comes from the word Wisuth meaning “white mass”‚ because pure Bismuth is white. When pure bismuth is mixed with lead‚ tin‚iron or cadmium the multi colored Bismuth is created. Bismuth falls under the pnictogen family. This family consists
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About Radiation: Radiation is an energy that is transmitted in the form of waves or tiny particles. These are electromagnetic waves‚ which are classified as ’ionizing radiation’ and ’non ionizing radiation’. Electromagnetic radiation is when an object gives out electromagnetic radiation. For example when you on a torch light‚ the light is an example of radiation. Ionising radiation has more energy than non ionising radiation. Therefore it is enough to cause chemical changes by breaking chemical
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Rubidium is a chemical element that was discovered in 1861 by Robert Bunsen and Gustav Kirchhoff‚ in Heidelberg‚ Germany through a scientific process of flame spectroscopy. During the process‚ Kirchhoff and Heidelberg noticed bright red lines in its emission spectrum which caused them to choose the name Rubidium derived from the Latin word rubidus‚ meaning "deep red". Rubidium is a chemical element with symbol Rb and atomic number 37 and an atomic mass of 85.4678. Rubidium is a soft‚ silvery-white
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