Chemistry, 06.07.2019 11:00 bookworm43

Why do elements such as neptunium, plutonium, californium, einstenium, bohrium, flerovium, radon, oganesson, and a few others have half a number in parentheses at the bottom of their box on the periodic table instead of the atomic weight? ! : )

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Why do elements such as neptunium, plutonium, californium, einstenium, bohrium, flerovium, radon, og...

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