Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Question about the forming of heavy elements.

  1. Jan 6, 2010 #1
    I know that I'm told that the heaviest elements can only be created in massive supernovae. Is this just theory, or have we created, in labs, lighter elements in scaled down collisions/explosions?
  2. jcsd
  3. Jan 6, 2010 #2
    I'm not too sure on the details of theory, but yes, "we" have created heavier elements. These lighter or heavier elements are formed through types of radioactive decay such as [tex]\alpha[/tex] and [tex]\beta[/tex] decay. Just a situation where there are not enough neutrons, too many neutrons, too little protons. Generally [tex]\alpha[/tex] decay occurs when there are too many protons, and [tex]\beta[/tex] decay when there are too many neutrons. This is induced of course. Some examples : fission of U-235 produces a source of neutrons, which are then bombarded into other elements to create heavier isotopes. Like Cobalt-60, Iodine-123, Strontium-90.

    As far as I know we can't actually "create" these new heavier or lighter elements. We just slightly alter existing ones and call them isotopes. And that too elements very, very close to each other. I don't know if we can actually just "create" something.

    Hope that helped.

    Here is an example:

    1.) [tex]^{238}_{92}U+ ^{1}_{0}n\xrightarrow~ ^{239}_{92}U[/tex]

    2.) [tex]^{239}_{92}U\xrightarrow~ ^{239}_{93}Np+ ^{0}_ {-1}e[/tex]

    3.) [tex]^{239}_{93}Np\xrightarrow~ + ^{239}_{94}Pu + ^{0}_{-1}e[/tex]
    Last edited: Jan 6, 2010
  4. Jan 6, 2010 #3

    Char. Limit

    User Avatar
    Gold Member

    We created Technetium. It didn't exist before we made it. It's also the only artificial element lighter than lead.
  5. Jan 6, 2010 #4
    we're talking about HEAVIER elements, though
  6. Jan 6, 2010 #5
    The OP did mention lighter elements as well.
  7. Jan 6, 2010 #6

    Char. Limit

    User Avatar
    Gold Member

    Also, every element above 92 was created in a lab.
  8. Jan 7, 2010 #7
    oh i see. sorry.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Question forming heavy Date
Atomic symbol notation question Wednesday at 7:02 PM
A diol - Question about this organic commpound Mar 10, 2018
Plasma questions Feb 14, 2018
Which elements form covalent bonds? Dec 11, 2017
Question about stability of Ozone Nov 20, 2017