The concept of lithium activity and reactivity are often recited in literature, yet their meanings are confusing at times, not to mention that how to characterize them remains elusive. Here, in this perspective article, a clear definition to differentiate lithium activity and reactivity is explained and practical examples of activity versus reactivity are illustrated and quantified. The proper method to describe, characterize, and determine each is rationalized. By clarifying these two properties and methods of characterizing them, the author hopes that better description and definitive characterization of activity and reactivity can be achieved in the future work to help understanding electrochemical phenomena and processes accessibly.

中文翻译：

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锂的活性和反应性：实践视角

锂活性和反应性的概念经常在文献中引用，但它们的含义有时令人困惑，更不用说如何表征它们仍然难以捉摸。在这里，在这篇透视文章中，解释了区分锂活性和反应性的明确定义，并说明和量化了活性与反应性的实际示例。描述、表征和确定每一个的正确方法都是合理的。通过阐明这两种性质和表征它们的方法，作者希望在未来的工作中能够更好地描述和明确表征活性和反应性，以帮助理解电化学现象和过程。