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Periodic Table

Is the Periodic Table of Elements Wrong?

You know the periodic table that hung on the wall of every science class you took at school? As of today, it’s wrong. Or more precisely, it's inaccurate.One of the biggest changes in decades is set to be made to the periodic table, with the atomic weight of 10 elements altered to better reflect how they occur in nature.For more than a century, scientists have assigned a standard single value to the atomic weights of elements. Now they say those numbers aren't as static as first believed.The International Union of Pure and Applied Chemistry (IUPAC) has decided that the weights of 10 elements will now be expressed as ranges instead of a single value, with an upper and lower limit.The elements are hydrogen, lithium, boron, carbon, nitrogen, oxygen, silicon, sulphur, chlorine and thallium."We actually give a starting and ending mass for the element that we believe encompasses all normal sources that you'll find in the world, and we think this is the better way of doing it."You might think ...

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