For context, this is the sight I’m referencing: http://www.toxicspot.com/military/alameda/rad/index.html#sec63
In: 1
A Curie (Ci) us an outdated unit of radioactivity. It’s defined as 3.7×10^(10) decays per second. A microcurie (µCi) is one millionth of that. Not all radiation is the same, so dangerous it is depends entirely on the specific isotope, the amount of that isotope, how you’re exposed to it, how long you’re exposed to it, and how far away you are from it For example, ingesting or inhaling as little as 220 µCi of polonium 210 is fatal, and that that corresponds to just a few dozen nanograms of polonium 210. On the other hand, you could hold over 2000 µCi of uranium 235 (1kg) in your bare hands and be totally fine.
Without more information, it’s impossible to say what’s what with that link. Like I said before, the curie is an outdated unit that’s been replaced and supplemented by other units that are much more useful in determining how dangerous some source of radioactivity is. Curies just tells you how *much* radioactivity there is,
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