# Had Enough?

**URL:** <https://community.cartalk.com/t/had-enough/72581>\
**Category:** General Discussion\
**Created:** [May 22, 2012, 4:13am UTC](https://community.cartalk.com/t/had-enough/72581 "2012-05-22T04:13:38Z")\
**Posts on this page:** 7\
**Page:** 3

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**Author:** ![kmccune](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/kmccune/32/1237_2.png) [@kmccune](https://community.cartalk.com/u/kmccune)\
**Post date:** [September 6, 2016, 9:31am UTC](https://community.cartalk.com/t/had-enough/72581/41 "2016-09-06T09:31:56Z")

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No disrespect intended .

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**Author:** ![GTZaskar](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@GTZaskar](https://community.cartalk.com/u/GTZaskar)\
**Post date:** [September 10, 2016, 2:16am UTC](https://community.cartalk.com/t/had-enough/72581/42 "2016-09-10T02:16:58Z")

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Do you consider yourself to be a “targeted individual”?

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**Author:** ![B.L.E](https://avatars.discourse-cdn.com/v4/letter/b/848f3c/32.png) [@B.L.E](https://community.cartalk.com/u/B.L.E)\
**Post date:** [September 10, 2016, 10:53am UTC](https://community.cartalk.com/t/had-enough/72581/43 "2016-09-10T10:53:21Z")

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> [@Barkydog](#):
>
> Isotope Half-lifeStrontium-90 28 yearsCaesium-137 30 yearsPlutonium-239 24,000 yearsCaesium-135 2.3 million yearsIodine-129 15.7 million yearsIt is clear from the table above that the left over nuclear isotopes from the generation of electricity through nuclear power are extremely long lived and therefore must be shielded from humans and the environment for a long time.

Generally speaking, the longer the half life, the less radioactive the substance is. U-238 has a half life of 4.5 billion years and it is barely radioactive, its compounds however are chemically toxic much like lead compounds are.  
Gold has a half life of forever and it’s not radioactive at all, totally useless as a nuclear fuel.

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**Author:** ![kmccune](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/kmccune/32/1237_2.png) [@kmccune](https://community.cartalk.com/u/kmccune)\
**Post date:** [September 11, 2016, 10:37am UTC](https://community.cartalk.com/t/had-enough/72581/44 "2016-09-11T10:37:08Z")

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Cant think of a more stable,sort of common material .

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**Author:** ![B.L.E](https://avatars.discourse-cdn.com/v4/letter/b/848f3c/32.png) [@B.L.E](https://community.cartalk.com/u/B.L.E)\
**Post date:** [September 11, 2016, 10:41pm UTC](https://community.cartalk.com/t/had-enough/72581/45 "2016-09-11T22:41:05Z")

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> [@kmccune](#):
>
> Cant think of a more stable,sort of common material

Gold came to mind because it is actually heavier than uranium, contrary to the claims of actors who play scientists on TV, and football coaches who teach science in schools claiming that uranium is the heaviest naturally occurring element.

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**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\
**Post date:** [September 12, 2016, 1:02am UTC](https://community.cartalk.com/t/had-enough/72581/46 "2016-09-12T01:02:32Z")

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> [@B.L.E](#):
>
> …claiming that uranium is the heaviest naturally occurring element.

They’re usually referring to atomic weight.

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**Author:** ![B.L.E](https://avatars.discourse-cdn.com/v4/letter/b/848f3c/32.png) [@B.L.E](https://community.cartalk.com/u/B.L.E)\
**Post date:** [September 12, 2016, 1:35am UTC](https://community.cartalk.com/t/had-enough/72581/47 "2016-09-12T01:35:14Z")

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But most of us think of heaviness as density, grams per ml or pounds per cubic inch, and there’s more to the story than atomic weight when it comes to the density of materials. For example, gold with an atomic number of 79 has a density of 19.32 g/ml. Add one proton and electron and a neutron or three and you have element #80, mercury and the density plummets to 13.546 g/ml.  
By the way, the density of uranium is only 18.35 g/ml.  
Tungsten, gold, platinum, rhenium, iridium, and osmium are heavier than uranium. Osmium is the heaviest at 22.6 g/ml and its atomic number is only 76.

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