Chapter 5: Electrons In Atoms A. Models of the atom i. The Development of Atomic Models Protons and neutrons make up a nucleus surrounded by electrons Rutherford’s model or theory ( figured electrons move around the nucleus) His theory didn’t explain why metals or compounds of medals give off characteristics of colors when heated. Also didn’t explain why the atomic model could not explain the chemical properties of elements ii. The Bhor Model Bohr proposed that an electron is found in specific
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Atoms make up everything around us‚ including ourselves. They consist of protons which give off a positive charge‚ electrons which give off a negative charge and neutrons which have no charge. In an atom there are the same amount of protons as there are electrons. If there weren’t it would cause the atom to behave differently. Atoms have layers around them called shells which contain electrons. Each shell can only hold a certain amount of electrons. Molecules can be multiple atoms of the same element
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nuclei of atoms in particular patterns. You will discover these patterns (and how electrons sometimes act like passengers boarding a bus) with the Electron Configuration Gizmo™. To begin‚ check that Lithium is selected on the PERIODIC TABLE tab. 1. The atomic number is equal to the number of protons in an atom. How many protons are in a lithium atom? ________3_____ 2. A neutral atom has the same number of electrons and protons. How many electrons are in a neutral lithium atom? ______3_______
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The notion of the atom all stared about 450 BC when a Greek scholar starting think when can something break on more‚ when are the pieces at their smallest‚ this mans name was Leucippus. Leucippus also had pupil who also thought the same way as Leucippus‚ his name was Democritus. They developed there ideas and when Democritus died his theory summed up briefly was that everything in the world was made of tiny pieced that could not be broken up any more. That how the word atom was derived from the Greek
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1. How was Intel able to survive and prosper in an industry environment that squeezed out most of its competitors? Soon after Intel’s early success‚ competitors entered the DRAM market‚ and a dynamic game developed in the industry that forced companies to balance the benefits of driving production down a steep experience curve against leapfrogging to the next generation. As long as you learned enough to make a device with high yield‚ you calculated that you could decrease costs by trying to make
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Subatomic particles Main article: Subatomic particle Though the word atom originally denoted a particle that cannot be cut into smaller particles‚ in modern scientific usage the atom is composed of various subatomic particles. The constituent particles of an atom are the electron‚ the proton and the neutron. However‚ the hydrogen-1 atom has no neutrons and a positive hydrogen ion has no electrons. The electron is by far the least massive of these particles at 9.11×10−31 kg‚ with a negative
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1.dote (dt) intr.v. dot·ed‚ dot·ing‚ dotes To show excessive fondness or love: parents who dote on their only child. DOTE‚ Span. law. The property which the wife gives to the husband on account of marriage. .. It is divided into adventitia and profectitia; the former is the dote which the father or grandfather‚ or other of the ascendants in the direct paternal line‚ give of their own property to the husband; the latter (adventitia) is that property which the wife gives to the husband‚ or that
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|Atoms and Molecules | |Everyday Science | | An atom is the smallest "piece" of an element that still has the properties of that element. A molecule is a combination of two or more | |atoms bonded together.
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n° = 20 e- = 18 2- D) Ca E) S ____________________________________________________________________________ 5) What mass in grams does 2.87 moles of sodium atoms have? 25 A) 1.39 x 10 B) 66.0 C) 8.01 D) 1.39 x 10 24 E) 1.73 x 10 24 ____________________________________________________________________________ 6) How many potassium atoms are contained in 15 g of potassium? 23 26 24 A) 2.3 × 10 B) 3.5 × 10 C) 9.0 × 10 D) 1.6 × 10 24 25 E) 3.3 × 10 ____________________________________________________________________________
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modern concept of the atom. I am going to give a brief history of the atomic model including Thomson’s atom‚ Rutherford’s atom‚ Bohr’s atom‚ and Schrödinger’s atom. I am going to include a diagram for each of these models. In 1897 physicist‚ J.J. Thomson‚ shortly after discovering electrons‚ proposed his Plum-Pudding model of the atom. He based this model on the two facts that he knew at the time: 1. atoms contain small negatively charged particles called electrons and 2. atoms behave as if they
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