Benfey's periodic snail, illustration. This periodic table was devised by German-born chemist Otto Theodor Benfey in 1964. The elements spiral out from hydrogen with two peninsulas for the transition metals and lanthanides and actinides. There are also spaces for yet-to-be discovered elements. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / VISUAL CAPITALIST |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |