In his account of scientific revolutions, Thomas Kuhn suggests that after a revolutionary change of theory, it is as if scientists are working in a different world. In this paper, we aim to show that the notion of world change is insightful. We contrast the reporting of the discovery of neon in 1898 with the discovery of hafnium in 1923. The one discovery was made when elements were identified by their atomic weight; the other discovery was made after scientists came to classify elements by their atomic number. By considering two instances of the reporting of the discovery of a new chemical element 25 years apart, we argue that it becomes clear how chemists can be said to have been responding to different worlds as a result of the change in the concept of a chemical element. They (1) saw, (2) did, and (3) reported different things as they conducted their research on the new chemical elements.

中文翻译：

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报告新化学元素的发现：在不同的世界工作，相隔仅25年

在他对科学革命的描述中，托马斯·库恩认为，在理论发生革命性变化之后，科学家们就好像在另一个世界中工作一样。在本文中，我们旨在表明世界变化的概念是有见地的。我们将 1898 年发现氖与 1923 年发现铪的报道进行了对比。第一个发现是通过元素的原子量来确定的；另一项发现是在科学家根据原子序数对元素进行分类之后做出的。通过考虑相隔 25 年报告发现一种新化学元素的两个实例，我们认为，由于化学元素概念的变化，可以说化学家如何对不同的世界做出反应变得很清楚. 他们（1）看到了，（2）做了，