How To Find Valence Electrons Without Periodic Table
Yous may be familiar with the chemical periodic table from schoolhouse, but there's more than meets the eye with this seemingly unproblematic scientific nautical chart. Acquire more about the periodic tabular array, including how information technology was developed and which elements accept some interesting history that you may non know almost.
It Has a Unmarried Writer With a Singular Inspiration
Yous may already know that one man, Dimitri Mendeleev, is responsible for creating the periodic table. But what you may not know is that he was inspired by a deck of cards to write out each element on a separate card and arrange them in groups aCC0rding to their atomic weight.
Mendeleev was and then confident in his system that he was able to create spaces on the table for elements that had not yet been discovered, including gallium. However, his pride also caused him to initially decline elements, like helium and other noble gasses, that didn't fit in with his construction.
Information technology'due south All the same Growing
It may seem that we've discovered all there is to know about the natural world at this indicate, but scientific breakthroughs happen all the time. New elements are notwithstanding being added in the 21st century.
That's Bananas
Bananas are well known to contain a high concentration of potassium, which is both an essential nutrient and an chemical element on the periodic table. This fact often gets diddled out of proportion, bananas actually contain a mildly radioactive class of potassium. They're completely safe to eat, though, and you should ignore whatever implications to the contrary.
Golden Hour
Aureate is not merely an element on the periodic table, it's also a color unto itself. The metal has its warm yellowish hue thank you to free energy level shifts in gold electrons, which causes the metal to absorb the bluish stop of the light spectrum.
Gallium: A Chemical science Demo Favorite
Gallium, i of the elements that Mendeleev predicted, is a favorite selection for chemistry classroom demonstrations. This solid metal liquefies at a relatively low temperature (around 85 degrees Fahrenheit), meaning you can shape it into a spoon that volition melt into liquid if y'all use it to stir a hot cup of tea.
Mercury Madness
Sir Isaac Newton is widely known as a genius, just he famously struggled with mental illness late in his life. Modern scholars believe this is probable due to mercury exposure during his experimentation with alchemy.
Over-the-Counter Mercury Poisoning?
Other historical figures had run-ins with mercury likewise. Lewis and Clark are said to have brought mercury-based laxatives with them on their due west journey. The pills were charmingly named "Blitz'south Thunderbolts."
Leaded Gasoline and Crime Rates
Mercury isn't the only element on the periodic table linked to behavioral issues. Lead has also been shown to cause developmental issues that may atomic number 82 to erratic behavior in adults. Many reputable sources believe that the switch from leaded to unleaded gasoline is causally related to a sharp drop in crime about 20 years later.
Temporary Names for New Elements
When new elements are discovered, they're subject to rigorous peer review before they're then verified by the International Spousal relationship of Pure and Applied Chemical science. Elements are usually given temporary names at this signal, and are given their permanent names aCC0rding to international guidelines.
Source: https://www.questionsanswered.net/article/10-interesting-facts-about-periodic-table?utm_content=params%3Ao%3D740012%26ad%3DdirN%26qo%3DserpIndex
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