Argon and Potassium, why are they reversed in the periodic table of elements?
Friday, October 30th, 2009 at
12:27 PM
In the modern periodic table of elements, the order of Argon and Potassium have been reversed, why?
Thanks
Filed under: Potassium Questions
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The order in the periodic table is based on the number of protons in the nucleus. The atomic weight usually follows the same order, but there are more Ar-40 than K-40, so the atomic weight is reversed here. This also happens with Te and I.
Because Argon has 18 protons/electrons and potassium has 19 protons/electrons and ALSO. Potassium belongs to the family of Alkaline metals and Argon belongs to the family of Noble Gases
Argon is 18 and Potassium is 19 on P.T. It’s been like that for as long as I can remember. Are you talking about why Argon is before Potassium, that is because the P.T. goes in order by atomic Number not atomic weight. If it did go by atomic weight Potassium would go before Argon. Potassium’s Atomic weight = 39.098 and Argon’s Atomic weight = 39.948