change. -snow melting and freezing into ice -fuel being changed into gas for cars -ponds freezing over to have a layer of ice Page 2 : E:\CC_Software\Workbench\CC-MW-CD\part2\phasechange\page2.cml 1. Describe the motion of atoms and molecules in a gas. the atoms and molecules bounce off one another each time they come in contact with eachother. they never bond‚ but reflect off of eachother and spread around. 2. How are the behavior and arrangements of gas molecules similar to and different
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M-F (12-1) Bonding Atoms to Form Molecules 1) Observe a) Atoms bond together to form molecules b) Some molecules are inorganic (non-living). c) Some molecules are organic (are/were living)‚ containing all or part of Mr. Cohn. d) Atoms can bond ionically‚ whereby an atom gives up valence electrons and becomes a + ion‚ and another atom receives those electrons and becomes a – ion. The overall charge on the molecule then becomes zero. e) Atoms can bond covalently
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Models of the Atom a) Plum Pudding Model The plum pudding model imagines the atom as a positively charged entity that contains randomly dispersed (negative) electrons within it. It is called the plum pudding model because the electrons in the positively charge cloud resemble raisins in a pudding. Thomson realized that all atoms must contain electrons‚ and since the atoms had a neutral charge‚ they must also include protons. This led him and other to think of the atom as a positively charged
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Cloud Model - an atom is comprised of a nucleus made up of neutrons and protons‚ and electrons moving extremely fast around the nucleus‚ forming an electron cloud instead of moving in orbits like what Bohr’s model suggests - proposed by Erwin Schrodinger in 1926‚ when he derived this model using a mathematical equation that he himself made http://1.bp.blogspot.com/-LEqGPr4h8R4/TsgJyT6vP6I/AAAAAAAAAKE/pTl6O3V2u0M/s200/electron_cloud_model.jpg The Planetary/Bohr’s Model - an atom is comprised of
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If we go back to the history of 1945‚ we come to know the history of 1945; we come to know the worst type of nuclear disaster the world had witnessed. On August 6‚ 1945 an atom bomb was dropped on HIROSHIMA in Japan‚ which devastated the entire town killing 66‚000 people and injuring nearly 69‚000. On August 9‚ 1945 another atom bomb was dropped on NAGASAKI. This bomb killed nearly 39‚000 people and injured more than 25‚000. Nuclear weapons are thus‚ far more destructive and harmful to the society
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The Periodic Properties of Atoms The Periodic Table: In the 1870’s‚ the Russian chemist Mendeleev developed the periodic table‚ based upon the relationship between the atomic weights of the elements and their chemical properties. As one ascends from lightest to heaviest elements‚ there is a periodic recurrence of chemical properties. For example‚ the elements with atomic numbers 2‚ 10‚ 18‚ 36‚ 54‚ and 86 all are chemically inert (the noble gases)‚ while those with atomic numbers one greater 3‚ 11
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The reason that I am interested in doing my research essay on the Atom Bomb is because I have always been interested in politics. How our world works‚ and what has effected it’s course‚ in my opinion‚ is one of the most important subjects to learn among our peers. After careful thought‚ I chose the atomic bomb because it is one of the few past inventions that still threaten us today. My base intention is to try an understand why men desired such an easy‚ yet consequential‚ means of war. What drives
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to the best answer on your Scantron form #882. 1. The __________ and __________ contribute most to the mass of an atom‚ while the _____________ determines the atom’s chemical behavior. A. B. C. D. E. proton‚ neutron‚ electron proton‚ electron‚ neutron neutron‚ electron‚ proton proton‚ photon‚ neutron none of the above 2. The symbol 63 Cu represents an isotope of the element copper. Give the following values: atomic 29 number‚ mass number‚ number of neutrons‚ number of electrons‚ and number
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Atoms and Molecules Basic units of EVERYTHING! Which of these is true? 1. “Atom” and “molecule” mean the same thing. 2. Atoms are made of molecules. 3. Molecules are made of atoms. What is the smallest structure in this list that can be seen with an ordinary desk microscope? 1. 2. 3. 4. Cells. Cell nucleus. Atoms. Chain molecules‚ such as proteins. Atoms In our model of scale‚ remember that the BB represented an atom. Electrons Hydrogen Helium Neutrons Protons As a class‚ identify
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The dropping of the atomic bombs on Hiroshima and Nagasaki remains among the most controversial events in modern history. Historians have actively debated whether the bombings were necessary. What effect they had on bringing the war in the Pacific to an end and what other options were available to the United States. As American policymakers struggled with how to use a powerful new technology and what the long-term impact of atomic weaponry might be‚ not just on the Japanese but on domestic politics
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