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CPO Scientists 18&19
CPO Scientists for chapter 18 & 19 Test
| Question | Answer |
|---|---|
| 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". |