https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx Roberto de Alba, Vero Magallanes, Daniel Cruz, Fabiana Anzaldo en-us 2020-09-23 12:46:30 UTC 2026-01-18 18:00:34 UTC hello@padlet.com fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771787097 2020-09-23 12:47:42 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771787097 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771814844 It’s a tool to recognize elements and their atoms easier]]> 2020-09-23 12:54:49 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771814844 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771816899 It was created by Mendeleev]]> 2020-09-23 12:55:17 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771816899 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771817566 It’s divided by periods]]> 2020-09-23 12:55:27 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771817566 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771823821 By early 1869, Mendeleev had made enough progress to realize that some groups of similar elements showed a regular increase in atomic weights]]> 2020-09-23 12:56:47 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771823821 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771842901 “Elements arranged according to the size of their atomic weights show clear periodic properties”]]> 2020-09-23 13:01:36 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771842901 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771845705 he structured his thinking by writing each of the 63 known elements’ properties on an individual note card.]]> 2020-09-23 13:02:19 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771845705 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771848134 other elements with roughly equal atomic weights shared common properties.]]> 2020-09-23 13:02:55 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771848134 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771854777 It appeared that ordering the elements by their atomic weight was the key to categorizing them.]]> 2020-09-23 13:04:33 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771854777 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771867624 Legend says that Mendeleev did his table in 1 day. February 17 1869]]> 2020-09-23 13:07:29 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771867624 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771872371 Johan Wolfgang noticed the peculiarities in groupings in 1817]]> 2020-09-23 13:08:35 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771872371 https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771873976 Neweton’s Principia of 1867, the book that introduced the laws of motion and gravity the periodic table was 150 years ago by the Russian chemist Dimitri Ivanihavihc]]> 2020-09-23 13:08:57 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771873976 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771874746 Dalton proposed new substances when atoms where disconnected or joined]]> 2020-09-23 13:09:08 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771874746 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771877565 Not only had Mendeleev predicted the existence of these elements, but he had also correctly described their properties in detail.]]> 2020-09-23 13:09:43 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771877565 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771878680 Dalton was wrong about some of the weights - oxygen is really 16 times the weight of hydrogen]]> 2020-09-23 13:09:57 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771878680 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771880572 Carbon is 12 times heavier than hydrogen]]> 2020-09-23 13:10:22 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771880572 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771885245 Oxygen atoms weighed 8 times as much as hydrogen atoms]]> 2020-09-23 13:11:24 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771885245 robertoalbaya https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771887939 The theory of the weight made the idea of the atoms useful]]> 2020-09-23 13:11:58 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771887939 https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771897215 The periodic table summarizes the entire science in 100 squares containing símbolos and numbers.]]> 2020-09-23 13:14:07 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771897215 https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771908687 It enumerates the elements that compose all earth elements revealing their properties and their Chemical theories.]]> 2020-09-23 13:16:40 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/771908687 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774483834 The periodic table it’s a table that organizes elements ]]> 2020-09-24 03:25:01 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774483834 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774487452 created 150 years ago this March by the Russian chemist Dmitrii Ivanovich Mendeleev.]]> 2020-09-24 03:27:28 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774487452 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774488524  the predictions of new elements emerged without any creative mathematics. ]]> 2020-09-24 03:28:12 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774488524 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774488914 Mendeleev had discovered a deep mathematical map of nature, for his table reflected the implications of quantum mechanics, the mathematical rules governing atomic architecture.]]> 2020-09-24 03:28:27 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774488914 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774489351 Mendeleev had noted that “internal differences of the matter that comprises the atoms” could be responsible for the elements’ periodically recurring properties. ]]> 2020-09-24 03:28:45 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774489351 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774490082 Mendeleev’s table did anticipate (and provide evidence for) the complex internal structure of atoms, at a time when nobody had any idea what an atom really looked like, or even whether it had any internal structure at all.]]> 2020-09-24 03:29:17 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774490082 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774490668 2020-09-24 03:29:43 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774490668 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774491427  electrons, which carried a negative electric charge, plus some positively charged component to make atoms electrically neutral.]]> 2020-09-24 03:30:17 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774491427 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774495221  the amount of positive charge in the nucleus (the number of protons it contained, or its “atomic number”) determined the correct order of the elements in the periodic table.]]> 2020-09-24 03:32:55 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774495221 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774496307 Bohr created his own version of the table in 1922, based on experimental measurements of electron energies (along with some guidance from the periodic law).]]> 2020-09-24 03:33:39 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774496307 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774497057  Hundreds of versions of the periodic table have been devised and published. The modern form, a horizontal design in contrast with Mendeleev’s original vertical version]]> 2020-09-24 03:34:08 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774497057 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774499405 Döbereiner noted that certain sets of three elements (he called them triads) showed a peculiar relationship.]]> 2020-09-24 03:35:44 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774499405 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774499781  Bromine, for example, had an atomic weight midway between the weights of chlorine and iodine, and all three elements exhibited similar chemical behavior. Lithium, sodium and potassium were also a triad.]]> 2020-09-24 03:36:00 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774499781 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774500334 Other chemists perceived links between atomic weights and chemical properties]]> 2020-09-24 03:36:26 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774500334 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774501176 “The periodic table,” wrote the chemist Peter Atkins, “is arguably the most important concept in chemistry.”]]> 2020-09-24 03:36:59 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774501176 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774501925 “Before the promulgation of this law the chemical elements were mere fragmentary, incidental facts in Nature,” Mendeleev declared.]]> 2020-09-24 03:37:28 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774501925 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774502391 “The law of periodicity first enabled us to perceive undiscovered elements at a distance which formerly was inaccessible to chemical vision.”]]> 2020-09-24 03:37:47 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774502391 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774503101 Mendeleev’s table did more than foretell the existence of new elements.]]> 2020-09-24 03:38:15 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774503101 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774503813  His table finished the transformation of chemical science from the medieval magical mysticism of alchemy to the realm of modern scientific rigor. ]]> 2020-09-24 03:38:40 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774503813 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774504346  The periodic table symbolizes not merely the constituents of matter, but the logical cogency and principled rationality of all science.]]> 2020-09-24 03:38:58 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774504346 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774506522 2020-09-24 03:40:27 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774506522 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774506701 2020-09-24 03:40:34 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774506701 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774507646 The periodic table is also divided by groups ]]> 2020-09-24 03:41:11 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774507646 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774509004 Amazing discovery that changes chemistry ]]> 2020-09-24 03:42:04 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774509004 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774511348 Mendeleev’s table had become an oracle. It was as if end-of-game Scrabble tiles spelled out the secrets of the universe. ]]> 2020-09-24 03:43:17 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774511348 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774512663 The law’s approval may have been more due to its power to explain established chemical relationships. ]]> 2020-09-24 03:44:09 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774512663 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774513781 Mendeleev’s prognosticative accuracy certainly attracted attention to the merits of his table.]]> 2020-09-24 03:44:43 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774513781 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774514752 2020-09-24 03:45:20 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774514752 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774520191 2020-09-24 03:49:13 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774520191 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774520326 2020-09-24 03:49:19 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774520326 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774522446 2020-09-24 03:50:48 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774522446 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774524048 2020-09-24 03:51:49 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774524048 fabianaanzaldoar https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774526511 2020-09-24 03:53:31 UTC https://padlet.com/fabianaanzaldoar/r82a5mte253ov0jx/wish/774526511