Why Did Mendeleev Leave Gaps In The Periodic Table

There was a period in history when no one knew much about the elements. It was called the "Periodic Table". But why would they leave a gap in it? And why was it a male scientist, Dmitri Mendeleev, who realized what was missing?

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How to Spot Fake Louis Vuitton Purses

1. Look for the “made in” mark etched in the bag’s leather. Authentic Louis Vuitton bags always have a stamp beneath that reads “Louis Vuitton” and “made in France” (or another nation if produced overseas). If your bag lacks this marking, it is most likely a forgery. Look for a stamp that has been pressed directly into the leather of your bag. Certain characteristics of the stamp should be present to demonstrate its legitimacy. These are some examples: The bottom of the Ls has a short leg. Os that are rounder and larger than the L. Ts that seem to be touching. The lettering is thin and sharp. If you’re confused about the stamp’s appearance, compare the wording on the bag to an authentic Louis Vuitton stamp picture. 2. Check to verify whether the date code on the bag matches the “manufactured in” stamp. Inside the bag, look for the date code around the top edge of the bag’s opening. The date code should consist of two letters and a four-digit number. The first two digits in the four-dig
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