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17 Cards in this Set
- Front
- Back
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Who thought of the atom? |
Democratis in 400 BC |
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Who found evidence that Atoms existed? |
Dalton in 1808 |
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Who found the nucleus? |
Ernest Rutherford in 1708 |
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Who found Electrons? |
J.J Thompson in 1897 |
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Electrons go like planets around the sun? |
Bohr in 1913 |
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1930 |
Current model Modern Atomic theory |
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What was ernesst rutherfords model? |
Gold foil |
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What was JJ thompsons model? |
Plum Pudding |
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What is avogadro's #? |
6.022 * 10 ^23 |
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Atomic number is equal to? |
The number of protons |
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what is an isotope? |
Element with a different number of neutrons |
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What are valence electrons? |
Electrons on the outside layer |
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What are the names of the four orbitals? |
SPDF |
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Protons + neutrons = |
mass number |
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Avogadro's number is the amount of atoms in what? |
A mole |
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Avogadro's number is useful for? |
Counting atoms |
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What two things were in the nucleus? |
Protons, Neutrons |
