Why does Uranium-238 taking a neutron become Plutonium-239 and not Uranium-239?

I expect the real chemists will already be able to tell, I'm on a late night bender going down the nuclear fission rabbit hole. I am no more a chemist than anyone else who took chemistry in college and barely passed. But I thought the number after an element was the total number of protons and neutrons in it, and when you have different amounts of neutrons, you get isotopes. So since we aren't adding or subtracting a proton, I thought adding a neutron to Uranium-238 would result in another, albeit man-made, isotope of Uranium. Long story short, why is it called Plutonium?

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πŸ‘€︎ u/The_Mundane_Block
πŸ“…︎ Jan 28 2022
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Between 1966 and 1972, many heart pacemaker implants used radioactive Plutonium-238 embedded in the device as a power source. So-called Nuclear-Powered Cardiac Pacemakers could maintain continuous power for over 40 years. en.wikipedia.org/wiki/Rad…
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πŸ‘€︎ u/biohackable_gal
πŸ“…︎ Dec 13 2021
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why doesn't plutonium 238 explode but other isotopes do?
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πŸ‘€︎ u/aliendude369
πŸ“…︎ Sep 25 2021
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Are decaying radioisotopes (carbon 14, strontium 90, plutonium 238, etc.) a possible power source for bio-engineered bio-robots?

Yes, I did come up with this idea after looking up those radiation-eating fungi from Chernobyl.

Yes, I know the mechanism through which they eat radiation is still poorly understood and is probably not very efficient.

Still, though, living creatures need (relatively) very little energy to survive. A human being - already quite a large creature - needs only 100 watts at rest. Most RTGs on space probes can easily do ten times that, and they themselves aren't very efficient either.

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πŸ‘€︎ u/32624647
πŸ“…︎ Sep 15 2021
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TIL that Mars Curiosity Rover's main power is generated through a Radioisotope thermoelectric generator fueled with 4.8 kg plutonium-238 dioxide which can generate Electricity with a minimum lifetime of 14 years knovhov.com/curiosity-mar…
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πŸ‘€︎ u/charlotte-here
πŸ“…︎ Apr 10 2021
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Plutonium-238, shiny cause its high decay rate [2048x1371]

https://preview.redd.it/s0eqprrrqnk61.jpg?width=2048&format=pjpg&auto=webp&s=25eb4939835cc2b70d14ca993c422156a7a9d318

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πŸ‘€︎ u/Matteo_ElCartel
πŸ“…︎ Mar 02 2021
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Hello. I have some questions: After U-235 fission what happens to the isotopes into which it divides? Is there plutonium at Chernobyl? If so, what type and where did he come from? Why is plutonium-238 preferred when it comes to obtaining energy than Pu-239? Thank you.
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πŸ‘€︎ u/Plutoniu-239
πŸ“…︎ Jul 22 2021
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The U.S.'s plutonium-238 shortage is coming an end. Scientists have found a new way to create the plutonium that powers deep space missions. Oak Ridge National Lab has automated a crucial part of the 238Pu creation process allowing for more than double the plutonium-238 pellets made per week. popularmechanics.com/spac…
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πŸ‘€︎ u/MaryADraper
πŸ“…︎ Jan 09 2019
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How Plutonium-238 is made for radioisotope power sources. youtu.be/-sh5XZo5wRE
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πŸ‘€︎ u/The__Real__pepe
πŸ“…︎ Apr 26 2021
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TIL that satellites in the 1960s used nuclear radiation for power by radioisotope thermoelectric generators. However, in 1964 such a satellite disintegrated and spread approx. 1 kg of radioactive plutonium-238 over the planet. This failure led NASA to develop solar PV energy technology. en.wikipedia.org/wiki/Sys…
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πŸ‘€︎ u/Sansabina
πŸ“…︎ Aug 07 2020
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Why don't we see more images of plutonium or Uranium 238 ( or 235 I forget) on the web?

We see tons of pictures of other elements but there are every few of these, espically plutonium.

I have always believed that radioactive metals glowed green but turns out they don't and that saddens me lol. But could the reason that plutonium is unstable or does it break cameras or something?

If anyone knows where I can find more images , espically plutonium other then the ones that are already on google please let me know.

I'm sorry If this does not long belong here just let me know and il delete it.

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πŸ“…︎ Dec 22 2020
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"Curiosity" Mars Rover fueled with 4.8 kg plutonium-238 dioxide which can Generate Electricity and Power up the Rover for more than 14 years knovhov.com/curiosity-mar…
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πŸ‘€︎ u/TechNewsCat
πŸ“…︎ Apr 12 2021
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Savannah River Plant Plutonium-238 in Space How SRS helped lay the foundation for space voyages like Perseverance postandcourier.com/aikens…
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πŸ‘€︎ u/DV82XL
πŸ“…︎ Mar 05 2021
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Mars 2020 rover [right corner] with Plutonium 238 ready to load in the hatch
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πŸ‘€︎ u/IworkatNASA
πŸ“…︎ Apr 15 2019
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A pellet of plutonium-238, the powerhouse of every outer solar system missions so far
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πŸ‘€︎ u/CitoyenEuropeen
πŸ“…︎ Jan 20 2020
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How is Plutonium 238 hot?

I have been researching radioisotope thermoelectric generators (RTG) and got stuck on why the decay releasing alpha particles leads it to being hot? also why do RTG need fins to dissipate the heat when we are trying to convert it to energy?

Edit: Thanks for all the answers, after watching The Martian for the fifth time I got really interested in the mechanics of it heat production when he digs up the chuck of (what I assume is) plutonium

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πŸ‘€︎ u/lewlew241
πŸ“…︎ Mar 21 2017
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Curiosity's 4.8 kg of Plutonium-238 dioxide glowing its graphite container red hot. Heat given off by the decay of this isotope is converted into electric voltage by thermocouples, providing constant power during all seasons and through the day and night.
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πŸ‘€︎ u/piponwa
πŸ“…︎ Jun 26 2016
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TIL On May 14 1945 Albert Stevens's gastric ulcer was misdiagnosed as terminal cancer and was injected with a very lethal and the highest dose of plutonium administered to any human but went on to live for another 20 years as the plutonium Pu-238 (half-life: 88 yrs) slowly decayed within his body wikivisually.com/wiki/Alb…
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πŸ‘€︎ u/vulcan_on_earth
πŸ“…︎ May 14 2020
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NASA starts fueling up Mars 2020 rover's nuclear powerplant - the MMRTG isn't a nuclear reactor, but more of a nuclear battery. Specifically, it generates 110 watts of power through the natural decay of the plutonium-238 radioactive isotope set in eight General-Purpose Heat Source (GPHS) modules. newatlas.com/nasa-mars-20…
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πŸ‘€︎ u/mvea
πŸ“…︎ Jul 25 2019
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Why is Plutonium-239 fissile but Plutonium-238 isn't?
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πŸ‘€︎ u/quirkylol
πŸ“…︎ Mar 12 2020
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Plutonium-238? U.S. Starts Making Nuclear Fuel For Deep Space Missions forbes.com/sites/williamp…
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πŸ‘€︎ u/ThereIsNoCutlery
πŸ“…︎ Nov 09 2015
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TIL NASA is in a plutonium-238 crisis - there's not much left businessinsider.com/nasa-…
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πŸ‘€︎ u/BusbyBusby
πŸ“…︎ Apr 24 2018
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TIL NASA is running low on the material (plutonium-238; a byproduct of nuclear weps) that powers many of its deep-space missions. NASA today has about 77 pounds. If NASA hits a plutonium bottleneck, the future of deep-space exploration could hang in the balance for untold years businessinsider.com/nasa-…
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πŸ‘€︎ u/Subsinuous
πŸ“…︎ Jan 14 2018
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A pellet of plutonium-238
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πŸ‘€︎ u/Hamstersenpai
πŸ“…︎ Jan 21 2020
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For the the first time in nearly 30 years, the U.S. has produced Plutonium-238 for use on space missions. energy.gov/articles/us-de…
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πŸ‘€︎ u/Pomerantz
πŸ“…︎ Dec 22 2015
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Curiosity's 4.8 kg of Plutonium-238 dioxide glowing its graphite container red hot. Heat given off by the decay of this isotope is converted into electric voltage by thermocouples, providing constant power during all seasons and through the day and night.
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πŸ‘€︎ u/a_turd
πŸ“…︎ Jun 27 2016
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whp fuckin g cares anymore lower me into a bath of lukewarm plutonium-238 thanks
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πŸ‘€︎ u/yosstedd
πŸ“…︎ Jan 21 2020
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Apollo 12 astronaut Alan Bean, putting Plutonium 238 fuel into the SNAP 27 (system for nuclear auxiliary power) radioisotope thermoelectric generator, 1969 [4,000 Γ— 4,164] x-post /r/HI_Res
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πŸ‘€︎ u/lilyputin
πŸ“…︎ Mar 01 2016
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Plutonium-244 doesn't naturally occur on Earth not because it's too unstable, but because the supernova(s) that seeded our solar system was only powerful enough to produce Uranium-238. There are probably other worlds that do have plutonium, and others where the heaviest element is lead. scienceblogs.com/startswi…
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πŸ‘€︎ u/peoplma
πŸ“…︎ Jun 14 2017
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On Apollo 12 and later Apollo missions, the scientific experiments were powered by Radioisotope Thermoelectric Generators (RTG). Here we see astronaut Alan Bean, Apollo 12 lunar module pilot, transferring 3.8 kilograms (8.4 lb) of plutonium-238 from the lunar module to the RTG. (1969)
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πŸ‘€︎ u/piponwa
πŸ“…︎ May 03 2016
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Mars 2020 rover [right corner] with Plutonium 238 ready to load in the hatch
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πŸ‘€︎ u/computerfreund03
πŸ“…︎ Apr 15 2019
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For the the first time in nearly 30 years, the U.S. has produced Plutonium-238 for use on space missions. energy.gov/articles/us-de…
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πŸ‘€︎ u/Pomerantz
πŸ“…︎ Dec 22 2015
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NASA is running out of the special kind of plutonium needed to power deep space probes, worrying planetary scientists who say the U. S. urgently needs to restart production of plutonium-238. npr.org/templates/story/s…
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πŸ‘€︎ u/ed_lisa
πŸ“…︎ Sep 28 2009
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TIL that some brands of cardiac pacemakers used to be powered by Plutonium-238 osrp.lanl.gov/pacemakers.…
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πŸ‘€︎ u/notusuallyhostile
πŸ“…︎ Apr 13 2019
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Plutonium-238 has been produced in the US for the first time in 30 years redorbit.com/news/science…
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πŸ“…︎ Dec 23 2015
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A glowing pellet of fuel-grade plutonium-238 imgur.com/4NNg9Qy
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πŸ‘€︎ u/ken27238
πŸ“…︎ Mar 14 2013
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People hate to hear about nuclear waste, so why haven't we built integral fast or SCFRs to use up the uranium-238 and plutonium-239 that we do have?

Seems it would make sense. Say you can solve the nuclear "waste" crisis with technology proven to work in the past and people generally throw money at you.

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πŸ“…︎ Jun 13 2017
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The U.S.'s plutonium-238 shortage is coming an end. Scientists have found a new way to create the plutonium that powers deep space missions. Oak Ridge National Lab has automated a crucial part of the 238Pu creation process allowing for more than double the plutonium-238 pellets made per week. popularmechanics.com/spac…
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πŸ‘€︎ u/PyroDesu
πŸ“…︎ Jan 09 2019
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On Apollo 12 and later Apollo missions, the scientific experiments were powered by Radioisotope Thermoelectric Generators (RTG). Here we see astronaut Alan Bean, Apollo 12 lunar module pilot, transferring 3.8 kilograms (8.4 lb) of plutonium-238 from the lunar module to the RTG. (1969)
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πŸ‘€︎ u/piponwa
πŸ“…︎ May 03 2016
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For the first time in 27 years, U.S. produces plutonium-238 to power space missions geekwire.com/2015/first-t…
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πŸ‘€︎ u/abledanger
πŸ“…︎ Dec 22 2015
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On Apollo 12 and later Apollo missions, the scientific experiments were powered by Radioisotope Thermoelectric Generators (RTG). Here we see astronaut Alan Bean, Apollo 12 lunar module pilot, transferring 3.8 kilograms (8.4 lb) of plutonium-238 from the lunar module to the RTG. (1969) [4000 x 4164]
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πŸ‘€︎ u/piponwa
πŸ“…︎ May 03 2016
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TIL more than a fifth of USA's Plutonium-238 supply was spent to power the Curiosity mars rover. wired.com/2013/09/plutoni…
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πŸ‘€︎ u/qwerqmaster
πŸ“…︎ May 04 2014
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Peak Plutonium-238? U.S. Starts Making Nuclear Fuel For Deep Space Missions forbes.com/sites/williamp…
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πŸ‘€︎ u/gramps14
πŸ“…︎ Nov 15 2015
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