A special thanks to RadiaCode for sponsoring today's video. Their useful geiger counters can be bought at https://www.radiacode.com/products. The current periodic table seemingly has a major flaw. In the case of 4 specific elements, a majority of any natural sample that exists are naturally radioactive. And yet, these elements, such as rhenium and indium are not classified as radioactive. Today's video discusses this unusuality which is often forgotten about due to the absurd rarity of these slightly radioactive elements. In the case of rhenium, it is so rare that in large concentrations it can only be found near the top of an active remote volcano. Purchase Radiacode devices at: http://radiacode.com/GeologyHub Radiacode 103 Amazon link: https://www.amazon.com/dp/B0CSFYTDWK Radiacode 102 Amazon link: https://www.amazon.com/dp/B0CBQKND5W If you would like to support this channel, consider using one of the following links: (Patreon: http://patreon.com/geologyhub) (YouTube membership: https://www.youtube.com/channel/UCYeGh5VML5XPr5jYnzh3J6g/join) (Gemstone & Mineral Etsy store: http://prospectingarizona.etsy.com) (GeologyHub Merch Etsy store: http://geologyhub.etsy.com) Google Earth imagery used in this video: ©Google & Data Providers This video is protected under "fair use". If you see an image and/or video which is your own in this video, and/or think my discussion of a scientific paper (and/or discussion/mentioning of the data/information within a scientific paper) does not fall under the fair use doctrine, and wish for it to be censored or removed, contact me by email at [email protected] and I will make the necessary changes. Various licenses used in sections of this video (not the entire video, this video as a whole does not completely fall under one of these licenses) and/or in this video's thumbnail image (and this list does not include every license used in this video and/or thumbnail image): CC0 1.0: https://creativecommons.org/publicdomain/zero/1.0/legalcode CC BY 2.0: https://creativecommons.org/licenses/by/2.0/legalcode CC BY 3.0: https://creativecommons.org/licenses/by/3.0/legalcode CC BY-SA 3.0: https://creativecommons.org/licenses/by-sa/3.0/legalcode CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/legalcod Sources/Citations: [1] Teemu Arppe, Wikimedia Commons, https://commons.wikimedia.org/wiki/File:Simple_periodic_table_with_four-figure_atomic_weights.svg, CC0 1.0 license [2] Coplen, T.B., Meyers, F., and Holden, N.E., 2016, Standard and conventional atomic weights 2016 abridged to four significant digits: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F79Z9315 [3] The "isotopes of cadmium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Cadmium, CC BY-SA 4.0. [4] The "isotopes of europium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Europium, CC BY-SA 4.0. [5] The "isotopes of gold" chart on the Wikipedia page https://en.wikipedia.org/wiki/Gold, CC BY-SA 4.0. [6] The "isotopes of indium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Indium, CC BY-SA 4.0. [7] The "isotopes of lanthanum" chart on the Wikipedia page https://en.wikipedia.org/wiki/Lanthanum, CC BY-SA 4.0. [8] The "isotopes of lutetium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Lutetium, CC BY-SA 4.0. [9] The "isotopes of molybdenum" chart on the Wikipedia page https://en.wikipedia.org/wiki/Molybdenum, CC BY-SA 4.0. [10] The "isotopes of neodymium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Neodymium, CC BY-SA 4.0. [11] The "isotopes of platinum" chart on the Wikipedia page https://en.wikipedia.org/wiki/Platinum, CC BY-SA 4.0. [12] The "isotopes of potassium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Potassium, CC BY-SA 4.0. [13] The "isotopes of rhenium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Rhenium, CC BY-SA 4.0. [14] The "isotopes of rubidium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Rubidium, CC BY-SA 4.0. [15] The "isotopes of samarium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Samarium, CC BY-SA 4.0. [16] The "isotopes of tellurium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Tellurium, CC BY-SA 4.0. [17] The "isotopes of thorium" chart on the Wikipedia page https://en.wikipedia.org/wiki/Thorium, CC BY-SA 4.0. [18] The "isotopes of xenon" chart on the Wikipedia page https://en.wikipedia.org/wiki/Xenon, CC BY-SA 4.0. [19] The "isotopes of bismuth" chart on the Wikipedia page https://en.wikipedia.org/wiki/Bismuth, CC BY-SA 4.0. 0:00 Periodic Table Flaw 1:16 Isotopes 2:23 Rhenium 3:13 RadiaCode Sponsorship 4:38 Rhenium Ore 5:02 Rhenium Rarity 6:19 Kudriavy Volcano 6:31 Rheniite 6:57 Formation Model