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There are numerous isotopes of both plutonium and uranium ( all radioactive) thus it is not easy to say which element is more radioactive. However the half lives of the most active isotpe of each compound is follows

241Pu has a half life of 14 years

232U has a half life of 68.9 years

So in terms of activity, Plutonium is more radioactive; however uranium stays radioactive for a longer time.
The specific activity of plutonium is greater than the specific activity of uranium (comparison between 239Pu and 238U).

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βˆ™ 12y ago
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βˆ™ 6mo ago

Plutonium is generally more radioactive than uranium because of the specific isotopes produced during the decay process. Plutonium-239, for example, has a shorter half-life and emits more energetic radiation compared to most isotopes of uranium.

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βˆ™ 12y ago

The specific activity is different for each isotope and U and Pu have many isotopes.

But:

- the most common isotope of uranium (238U) has a specific activity of 3,3.10-7 Ci/g

- the most common isotope of plutonium (239Pu) has a specific activity of

6,2.10-2 Ci/g

Compared, plutonium is more radioactive.

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βˆ™ 12y ago

Plutonium is more dangerous: the specific activity is greater, the critical mass is smaller, the chemical toxicity is greater.

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βˆ™ 14y ago

Plutonium releases more energy in a nuclear reaction then uranium.

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βˆ™ 13y ago

Plutonium is more dangerous: more toxic and radioactive.

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βˆ™ 13y ago

If you think to critical mass, plutonium has a critical mass smaller than the critical mass of uranium.

Also plutonium is more toxic and dangerous.

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βˆ™ 13y ago

The most radioactive and dangerous is radon.

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No idea, im not a nerd. (jk Just Kidding)

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Q: What is more radioactive uranium or plutonium?
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