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'works', 'On Relations of Universals and Particulars' and 'The Periodic Table'
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19 ideas
27. Natural Reality / F. Chemistry / 1. Chemistry
17391
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Periodicity and bonding are the two big ideas in chemistry [Scerri]
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17415
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A big chemistry idea is that covalent bonds are shared electrons, not transfer of electrons [Scerri]
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17404
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Chemistry does not work from general principles, but by careful induction from large amounts of data [Scerri]
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17407
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The electron is the main source of chemical properties [Scerri]
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17409
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Does radioactivity show that only physics can explain chemistry? [Scerri]
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17392
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How can poisonous elements survive in the nutritious compound they compose? [Scerri]
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27. Natural Reality / F. Chemistry / 2. Modern Elements
17418
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It is now thought that all the elements have literally evolved from hydrogen [Scerri]
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17398
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19th C views said elements survived abstractly in compounds, but also as 'material ingredients' [Scerri]
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27. Natural Reality / F. Chemistry / 3. Periodic Table
17406
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Moseley, using X-rays, showed that atomic number ordered better than atomic weight [Scerri]
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17408
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Some suggested basing the new periodic table on isotopes, not elements [Scerri]
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17412
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Elements are placed in the table by the number of positive charges - the atomic number [Scerri]
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17414
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Pauli explained the electron shells, but not the lengths of the periods in the table [Scerri]
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17413
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Elements in the table are grouped by having the same number of outer-shell electrons [Scerri]
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17416
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Orthodoxy says the periodic table is explained by quantum mechanics [Scerri]
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17422
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The best classification needs the deepest and most general principles of the atoms [Scerri]
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17419
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Since 99.96% of the universe is hydrogen and helium, the periodic table hardly matters [Scerri]
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17395
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Elements were ordered by equivalent weight; later by atomic weight; finally by atomic number [Scerri]
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17417
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To explain the table, quantum mechanics still needs to explain order of shell filling [Scerri]
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17410
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Moseley showed the elements progress in units, and thereby clearly identified the gaps [Scerri]
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