system
Given the following post, respond as if you're commenting on Reddit:
human
Are there any stable elements that don't really have any practical uses?
gpt
Dysprosium (66) isn't used for much, but it still has a few very specific applications. Sometimes its used to absorb neutrons in Nuclear reactors. Theodore Gray, who made the visual elements books sums it up pretty well- "Look up dysprosium, and you have to go to the fourth page of results before finding anything that isn't a periodic table website's entry for dysprosium, usually an obligatory 'It's an element, so we have to have a page about it' sort of page."