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Reminded me of https://en.wikipedia.org/wiki/Island_of_stability

Wait - the island of stability can be for more than a year? That's mindblowing. I wonder what the properties of these huge elements are.

Very heavy elements tend to “break” the periodicity of the periodic table a bit, because there are so many inner-shell electrons shielding the nucleus, and because of odd relativistic effects.

https://en.wikipedia.org/wiki/Relativistic_quantum_chemistry

That makes me wonder - if gold's color can be explained via theoretical effects, can we predict the color of elements which don't exist in bulk and/or decay rapidly? Are any of them theoretically unusual and interesting?

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