Title Text:Most chemists thought the lanthanides and actinides could be inserted in the sixth and seventh rows, but no, they’re just floating down at the bottom with lots more undiscovered elements all around them. Origin:https://xkcd.com/2214/ https://www.explainxkcd.com/wiki/index.php/2214:_Chemistry_Nobel 许多化学家认为镧系元素和锕系元素应该在第六行和第七行。但并非如此，它们漂浮在底部，周围还有许多未被发现的元素。 http://xkcd.in/… Read more