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Science Mindmap nara 89A - Coggle Diagram
Science Mindmap nara 89A
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atomic theories
Ernest Rutherford
discovered: alpha and beta rays, set forth the laws of radioactive decay, and identified alpha particles as helium nuclei
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Neils bohr
discovered: electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element.
model: planetary model, the electrons encircle the nucleus of the atom in specific allowable paths called orbits
JJ thomson
he achieved the study of cathode rays culminating in the discovery of the electron, which was announced during the course of his evening lecture to the Royal Institution on Friday, April 30, 1897
His model which is plum pudding explains the depicts the electrons as negatively-charged particles embedded in a sea of positive charge.
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base
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uses
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The OH- ions interact strongly with certain substances, such as dirt and grease.
Bases give soaps, ammonia, and many other cleaning products some of their useful properties.
acid
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use of acid
Citric Acid = lemons, limes, & oranges
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Sulfuric acid is used in the production of fertilizers, steel, paints, and plastics.
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what is acid?
An acid is a solution that has an excess of H+ ions. It comes from the Latin word acidus that means "sharp" or "sour".
The more H+ ions, the more acidic the solution.
salt
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example
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basic salt: alcium carbonate CaCO3, sodium carbonate Na2CO3, lithium fluoride LiF
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neutral salt: Sodium chloride (NaCl), Sodium nitrate (NaNO3), Potassium sulphate (K2SO4), and Potassium chloride (KCl).
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