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The isotopic composition of natural uranium is not absolutely identical in all ore samples; this is valid also and for other elements. The long geological evolution can influence the isotopic composition.

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14y ago
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6mo ago

Variations in Atomic Mass are due to the presence of isotopes, which are different forms of an element with the same number of protons but different numbers of neutrons. This causes some atoms of the same element to have slightly different masses. This is why atomic masses are usually given as a range or average value to account for these variations.

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15y ago

Each element has different numbers of particles within it. Basic logic says if you add more of something it will get heavier; this holds true for the nuclei of atoms as well.

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9y ago

Different isotopes have different numbers of neutrons and a neutron's mass is almost equal to 1u.

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Q: Why are there variations in atomic mass?
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Related questions

Why is there an average atomic mass?

There is an average atomic mass because all atoms of the same element do not have the same amount of neutrons (isotopes), therefore variations in atomic mass exist. The average atomic mass of an element is the estimated average of all the atoms of the same element, given the average of different isotopes in a scientific sample.


Which sub atomic particles cause isotopes to appear?

Isotopes are caused by variations in the number of neutrons in an atom's nucleus. Neutrons are subatomic particles that do not carry an electric charge and contribute to an atom's mass. The different number of neutrons in isotopes result in variations in atomic mass.


Does an isotope of an element have a different atomic mass?

Yes, isotopes of an element have the same number of protons but different numbers of neutrons, leading to variations in atomic mass. This is why the atomic mass on the periodic table is often listed as a range for an element.


What is bigger the atomic mass or atomic number?

Atomic no.=no. of protons Atomic mass=no. of protons+no. of neutrons Hence, atomic mass is greater


What is the atomic mass-?

The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.


The mass of an atom usually expressed in atomic mass units is its?

Atomic mass.


What is the atomic mass of silver?

The atomic mass of silver is approximately 107.87 atomic mass units.


What is the atomic mass of aluminum?

The atomic mass of aluminum is approximately 26.98 atomic mass units.


Which has the lower atomic mass cobalt or nickel?

Cobalt has a lower atomic mass than nickel. The atomic mass of cobalt is around 58.9 atomic mass units, while the atomic mass of nickel is around 58.7 atomic mass units.


What is the difference between atomic mass and atomic mass unit?

The atomic mass unit is used to express the measure of the atomic mass.


What is the atomic mass of manganese?

The atomic mass of manganese is approximately 54.94 atomic mass units.


What is the atomic mass of arsenic?

The atomic mass of arsenic is approximately 74.92 atomic mass units.