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This reason is, simply, very obvious. Compare the numbers: 238 and 16. Since the orbitals are more full, and the nucleus is packed tighter, and Uranium is located after atomic number 84, it is unstable. All of the elements after 84 are unstable. But that doesn't count isotopes of the earlier elements, because they can be unstable.

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14y ago
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8y ago

Due to a large number of Nucleons (protons+neutron) the nuclear binding force is not enough strong to hold the nucleons unite.

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13y ago

It's a problem of the nucleus structure (number of neutrons and protons).

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8y ago

It's heavier.

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Q: Why is the atomic mass of uranium so much greater than the atomic mass of oxygen?
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Related questions

Why does plutonium have a less mass then uranium?

In their most stable forms, Uranium has an atomic mass of 238 and plutonium has an atomic mass of 244, plutonium has a greater mass than that of Uranium.


Does oxygen have a greater mass than chlorine?

Atomic oxygen does not have a greater atomic mass than chlorine, nor does molecular oxygen. The atomic mass of chlorine is approximately 35 g/mol, while molecular (O2) oxygen has a molecular mass of 32 g/mol.


What is the atomic mass of uranium?

The atomic weight of uranium (not mass) is 238,02891.


How do you know that all of the new elements will be larger than uranium?

The atomic mass is greater.


What is uraniums atomic mass?

Atomic weight (not mass) of uranium is 238,02891.


What is the atomic number for uranium?

the atomic mass number for uranium is 92


Whiumat is the mass number for Uranium?

The atomic weight of uranium is 238,02891(3) atomic mass units.


The largest atomic mass?

The non-synthetic element that has the largest atomic mass is uranium, although it is radioactive. The atomic mass of uranium is 238.0289.


What is the uranium atomic weight?

The atomic weight (not mass) of uranium is 238,02891(3).


What is the atomic mass for uranium?

The atomic weight of uranium is 238,02891(3); the word weight is correct here not mass.


Uranium atomic number mass and number of protons?

Uranium atomic number: 92 Uranium atomic weight: 238,02891 Uranium number of protons: 92


What is the weight of uranium?

Atomic mass number = Number of protons + Number of neutrons Number of protons of uranium nucleus is 92. The number of neutrons is different for each isotope. Example for 238U: 92 protons + 146 neutrons = 238