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Topic starter 06/11/2021 9:43 pm
As is known, in the periodic table of Mendeleev, the relative atomic masses of the elements are arranged in ascending order. But there are cases when the preceding element has a relative atomic mass greater than that of the next one after it. How many such cases are there and why is this happening?
07/11/2021 6:59 am
A very interesting question. The fact is that the table we use is now slightly changed and based on the atomic number, not the mass. That's why some elements "jumped"
07/11/2021 7:01 am
Unfortunately, I can't say exactly how many such elements, but you can easily look at the table and find out
Topic starter 07/11/2021 5:50 pm
Thank you, argon and potassium, cobalt and nickel, tellurium and iodine.
26/03/2022 8:59 pm
That's an interesting fact! You don't have much apportunities to surprise people with periodic table, and yet here we are)