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CPO Scientists 18&19

CPO Scientists for chapter 18 & 19 Test

QuestionAnswer
Alchemists They worked to change tin and lead into gold and find a magical way to extend life. They were very secretive.
Aristotle He suggested that all things were made up of some combination of the elements air
Avogadro's Number He suggested that atoms are found in clumps which he called molecules. The "mole" (6.02 x 10^23) was named in his honnor about 100 years after his idea was published.
Avogadro's Hypothesis He said that equal volumes of gas contain equal numbers of molecules. Published in 1811
Bohr He thought the atom had electrons moving around the nucleus in orbits and that moved by "quantum leap" from one energy level to the next.
Chadwick He found out that neutrons were present in the nucleus of atoms.
Dalton He wrote down his ideas about atoms into the Atomic Theory. His model atoms were solid spheres.
Democritus He first suggested that all matter could be explained by the existence of atoms
Einstein He made many contrbutions to physics including the size of atoms
Mendeleev He listed all the known elements from lightest to heaviest and made up a chart of the elements known as the periodic table of the elements.
Rutherford He conducted the "gold foil experiment" and added protons to the center of his atomic model with electrons on the outside of the atom.
Thompson He discovered the electron and thought that electrons were stuck in an atom like chocolate chips in a cookie or plumb pudding.
Lewis He developed a way to represent an atom and its valence electrons using dots called "dot diagrams".
Created by: tjmelia
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