1. Atomic and Molecular Structure a. Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. The Periodic Table organizes elements by their atomic number - from hydrogen (1) to whatever is the highest one currently known (>105). It is arranged so that similiar members fall in a list such as Chlorine Bromine etc.. The average atomic weight is usually shown with each element‚ but due to isotopes (caused buy nuclear varations)
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Why Not the Sun? Advantages of and Problems with Solar Energy by Ethan Goffman I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait until oil and coal run out before we tackle that. – Thomas Alva Edison‚ 1931 The oil embargo of the 1970s prompted a national surge of interest in solar energy. A solar water heater was installed in the White House‚ and photovoltaic panels first came into play‚ notably in California. While previously solar power as a direct
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Manhattan Project in World War II to model the process of nuclear detonation. It was a simulation of 12 hard spheres using a Monte Carlo algorithm. Computer simulation is often used as an adjunct to‚ or substitution for‚ modeling systems for which simple closed form analytic solutions are not possible. There are many different types of computer simulation; the common feature they all share is the attempt to generate a sample of representative scenarios for a model in which a complete enumeration of all
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Integrated Physics and Chemistry – Unit 2: The Structure of Matter Experiment: Atomic Structure In this experiment‚ you will have a chance to test the hypothesis that Ernest Rutherford used when determining the size of the nucleus. In his "gold foil experiment‚" Rutherford shot alpha particles at gold atoms. Once he realized that the alpha particles were hitting a concentrated positive mass‚ he developed the nuclear model of the atom. Next‚ he set out to determine the relative size of the nucleus
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Bohr - Rutherford Interactive Investigation 1. Complete the following chart as you work through the investigation. Atomic Number Element Symbol Element Name Number of Protons Number of Electrons Mass Number Number of Neutrons Electron Configuration 18 ArArgon181840222‚ 8‚ 85932610138114171547111216 2a) Now rearrange the chart above so that the elements appear in order of their atomic number and as they appear on the periodic table. Atomic NumberElement SymbolElement NameNumber
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simulation until the purple planet (body 2) has made one complete orbit (one year). 3. After the first orbit (year)‚ turn off the traces (show traces box) and watch another orbit (year) of the purple planet (body 2). Question One: Is blue moon (body 3) circling the yellow sun (body 1) or the purple planet (body 2)? Explain your answer. The blue moon is circling both the puple plane and the yellow sun. It is circling the purple planet‚ while the purple planet is circling around the sun. Therefore‚ it is
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The Atomic and Nuclear Structure of an Atom The atom has three main components the protons‚ neutrons‚ and electrons. The protons and neutrons make up the nucleus‚ while the electrons are found outside the atom’s nucleus. Each component of an atom has a charge to it. The protons have a positive charge. The electrons have a negative charge‚ and the neutrons have a neutral charge. The atoms also have a charge. For example hydrogen can be negative‚ positive or neutral. These are called
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Objectives 1-Describe the periodic trend in atomic radius and relate it to atomic structure 2- Describe the periodic trend in electronegativity and relate it to atomic structure Did you know? There are atoms with no electronegativity because electro negativity refers to the attraction of atoms of electrons in a compound; elements that do not form are assigned no electronegativity values. Atomic Radius ≠ Ionization Energy As you move from left to right on the periodic table‚ the number of
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Atomic structure: scientists 1. Democritus: 1st person to think of atom (500 BCE)- philosopher Atom is the smallest piece of an element that has same properties as the element. 2. Lavisier: Law of conservation of mass/ matter • Mass can’t be created or destroy; same amount of stuff 3. Joseph Proust: Law of constant composition (law of definite Proportions) • A compound is always made of the same elements in the same ratio. 4. John Dalton: English school teacher who derived the atomic theory
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Niels Bohr is a big person in the history of chemistry. If it wasn’t for him we would not have known as much as we do now about the atom. He came to a conclusion of so many unanswered questions people were left after the discovery of the electron. He also participated in the United State’s biggest project that helped us win World War II. If it wasn’t for Niels Bohr we probably would not have as many things as we do today. He is one‚ if not‚ the biggest person in the history of Chemistry. Niels
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