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Graphed the atomic volume v.s. the tomic weight Codiscoverer of the periodoc table |
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Main discoverer of the periodic table |
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| Added the noble gases to the table |
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| Used x-rays to show atomic numbers |
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| Addrd the actinide series to the periodic table |
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Group 1 Group 2 Groups 3-12 Group 17 Group 18 |
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Alkali metals Alkaline-earth metals transition elements halogens noble gases |
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| Medeleev's and Moseley's periodic laws |
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The physical and chemical properties of elements are a periodic function of their atomic weights...of "atomic numbers"-Moseley"s version, current |
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Number of electrons in valence shell |
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| Number of occupied electron shells |
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| Half the distance between adjacent nuclei of identical atoms at the point closest of approach |
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| Amount of energy needed to remove an electron from a neutral gaseous atom |
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The energy change occuring when an electron is gained by a neutral, isolated atom |
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| The amount of attraction that an atom has for shared electrons between it and another bonded atom |
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The electron sublevels being filled across each row of the table |
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1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d 7p |
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...gain electrons ...lose electrons |
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| Ionization energy increases...decreases... |
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increases L-R due to greater effective nuclear charge (adding protons) decreases t-b due to greater "electron shielding" |
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| Atomic radius decreases...increases... |
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decreases L-R due to greater effective nuclear charge (more protons) increases T-B due to more electron shells |
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| Electron affinity increases...decreases... |
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increases L-R due to greater effective nuclear charge decreases T-B due to greater distance and greater "electron shielding" |
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| Electronegativity increases...decreases... |
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increases L-R due to greater effective nuclear charge decreases due to greater distance and "electron shielding" |
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In ionization energies, the big jump b/w 1 and 2... the big jump b/w 2 and 3... the big jump b/w 3 and 4... |
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...group 1 ...group 2 ...group 13 |
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| 3 factors that effect the forces of attraction b/w electrons and the nucleus... |
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1. effective nuclear charge 2. distance 3. electron shielding |
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