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The answer is the atomic weight of the original element: It's the number on the top left of each element square of the Periodic Table.

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Agnes Bogan

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2y ago
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11y ago

The known weighted-average

mass of all the naturally occurring* isotopes for an element is the atomic mass of the element.

____________________

*This is not the same as "all the known isotopes", becausemost elements have known isotopes that are not naturally occurring.

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14y ago

Atomic Mass The technical answer would be average atomic mass Is the "atomic mass found on the Periodic Table.

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16y ago

All of the isotopes in an element's atomic masses divided by the amount of isotopes there are is the weighted-average mass of the mixture of an elements isotopes.

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13y ago

The answer is the atomic weight of the original element: It's the number on the top left of each element square of the periodic table.

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13y ago

What. (your question isn't even a complete sentence.)

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7y ago

This is the atomic weight.

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Q: What Is the weighted average of all of the isotopes of an element.?
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Why do elements which exists as isotopes have fractional atomic mass?

Each isotope of an element has a different Atomic Mass, so an average is taken of all the isotopes, but the average is weighted because the natural abundance (%) of each isotope is factored in. If hydrogen-1 is much more abundant than deuterium and tritium, then the weighted average will be closer to 1 than 2 or 3 but not a whole number. The following equation shows how percent abundance factors into the weighted average. (atomic mass A)(X% abundance) + (atomic mass B)(Y% abundance)...=(weighted average of all isotopes of the element)(100% abundance)


When the masses of all naturally occurring isotopes of a particular element are averaged the result is called an elements what?

The weighted average of all of the natural occuring isotopes for a particular element is called its Atomic Weight (or Relative Atomic Mass)


What is the isotope number used for on the periodic table?

There is not an isotope number on the Periodic Table of Elements. There is an atomic number (# of protons) and the average atomic mass. The average atomic mass is the weighted average of all the naturally occurring isotopes for each element. This number is not a whole number, because it is an average of all the isotopes for a particular element.


What is in an atom that is equall to the weighted average of the masses of all the naturally occurring isotopes of that element?

The atomic weight of the element (syn.: mass number).


When the masses of all naturally occurring isotopes of a particular element are averaged the result is called the element's what?

If the masses of the individual isotopes are on the scale where one atom of the isotope carbon-12 has a mass of 12 units, then the weighted average of the masses of all isotopes present in a natural sample of an element is called its relative atomic mass, r.a.m.

Related questions

What is an average of the masses of all the isotopes that occur in nature For an element?

The weighted average for all isotopes that occur in nature for an element is its atomic weight listed on the Periodic Table of the elements.


What is the average mass of the mixture of an elements isotopes?

All of the isotopes in an element's atomic masses divided by the amount of isotopes there are is the weighted-average mass of the mixture of an elements isotopes.


An average of the masses of all the naturallly occurring isotopes of an element?

The weighted average for all isotopes that occur in nature for an element is its atomic weight listed on the Periodic Table of the elements.


What is the weighted-average mass of all the known isotopes for an element?

The known weighted-averagemass of all the naturally occurring* isotopes for an element is the atomic mass of the element.____________________*This is not the same as "all the known isotopes", becausemost elements have known isotopes that are not naturally occurring.


The average mass of all the known isotopes of an element is what?

The known weighted-averagemass of all the naturally occurring* isotopes for an element is the atomic mass of the element.____________________*This is not the same as "all the known isotopes", becausemost elements have known isotopes that are not naturally occurring.


What is a weighted average of the masses of all of the naturally occurring isotopes of an element?

The mean Atomic Mass.


Is the weight average mass of all the known isotopes for an element?

The known weighted-averagemass of all the naturally occurring* isotopes for an element is the atomic mass of the element.____________________*This is not the same as "all the known isotopes", becausemost elements have known isotopes that are not naturally occurring.


Atomic mass used in a sentence?

The atomic mass of an element is the weighted average of the masses of all the stable isotopes of the element (if it has any), weighted by the natural occurrence levels of the isotopes in the elements as found on earth or in the atmosphere.


What is the weighted average of the masses of all naturally occurring isotopes of an element?

The atomic weight of the element (syn.: mass number).


What is the weighted average mass of all the know isotopes for an element?

It is its Atomic Mass and why atomic mass is frequently not a whole number.


Why do elements which exists as isotopes have fractional atomic mass?

Each isotope of an element has a different Atomic Mass, so an average is taken of all the isotopes, but the average is weighted because the natural abundance (%) of each isotope is factored in. If hydrogen-1 is much more abundant than deuterium and tritium, then the weighted average will be closer to 1 than 2 or 3 but not a whole number. The following equation shows how percent abundance factors into the weighted average. (atomic mass A)(X% abundance) + (atomic mass B)(Y% abundance)...=(weighted average of all isotopes of the element)(100% abundance)


When the masses of all the naturally occurring isotopes of a particular element are averaged the result is called the elements what?

The weighted average of all of the natural occuring isotopes for a particular element is called its Atomic Weight (or Relative Atomic Mass)