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AMC MAY U15

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AMC MAY U15

Created by

Clara Chen
Clara Chen
Taiwan

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AMC MAY U15Online version

AMC MAY U15

by Clara Chen
1

continued discovered milestone properties indispensable grave systemize conserve sustainability consumption Laid gaps abundance version origins indicate achieved memorize potential essential

Without the 118 chemical elements , absolutely nothing would exist . Of course , most of us see the periodic table as an academic headache , something to ahead of our final chemistry exams . But as we mark 152 years since this remarkable creation , let's take a moment to understand the story behind this of modern science .
To trace the modern periodic table to its , we have to go back to the 1860s . This was the middle of a period of rapid scientific discovery , with 50 elements during that century alone . Several chemists attempted to create a system for organizing the elements so that they could be studied and better understood . However , it was Dmitri Mendeleev , a university professor in St . Petersburg , Russia , who succeeded in the end .
Mendeleev was preparing a textbook on the chemical behavior of different elements when he noticed a pattern . Ordering the elements according to this pattern , he unintentionally managed to them according to their atomic number , which is the number of protons that an individual element has . Mendeleev's model also grouped elements with similar , such as helium and neon , in the same column .
This newly formulated table more than just helping to standardize the way scientists ordered and studied the elements . Mendeleev's table revealed in the pattern , allowing scientists to predict and search for undiscovered elements . The soft silver metal gallium was discovered in 1875 , and the number of elements in the table has since grown from the original 63 to the 118 we know today .
Recently , scientists have found a new use for Mendeleev's table . In 2019 , the European Chemical Society put forward a new of the table that presents the 90 elements that occur in nature according to their available reserves .
out across an oblong manipulation of the original table , each element's cell is sized according to its in nature . Elements with a plentiful supply , such as hydrogen and oxygen , appear in swollen green boxes . Smaller cells in orange and red , meanwhile , vulnerability , red being used for elements whose readily accessible natural reserves may become depleted within the next 100 years .
While many endangered elements may not disappear entirely , global shortages could have consequences . Helium , which is shaded red in the table , is for the operation of key medical equipment . Without gallium , we may also no longer be able to harness solar energy .
Another feature of the table shows how exploitation of key materials will hit us all closer to home . Thirty - one of the table's cells carry a smartphone symbol indicating that these elements are currently used in our handheld devices . At current rates of , the devices that we have come to rely on to communicate , socialize , and network have become their own endangered species .
That being said , contemporary study of the elements is not entirely centered around questions of . A new periodic table under development by scientists at Moscow's Skolkovo Institute of Science and Technology suggests that some elements are still yet to be discovered . Nevertheless , we must remember that these building blocks are not infinite . We must therefore work to understand how humanity consumes these elements and how we can them .

 
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