Besonderhede van voorbeeld: -919992901400829575

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English[en]
Janet, in his table, unlike the standard periodic table, places the f-block to the left and the s-block to the right, and banishes Helium (He) from the group of noble gases.
Spanish[es]
Janet, en su tabla, coloca el bloque f a la izquierda y el bloque s a la derecha, separando al helio (He) del grupo de los gases nobles.

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