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What is isotopic mass?

Updated: 8/11/2023
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15y ago

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Every known item of matter in the universe has some amount of mass, even if it is very small. But what about something so insignificant in mass that comparing it to a gram is like comparing a millimeter to the distance between Earth and the nearest galaxy? Obviously, special units are needed for such measurements; then again, one might ask why it is necessary to weigh atoms at all. One answer is that everything is made of atoms. More specifically, the work of a chemist requires the use of accurate atomic proportions in forming the molecules that make up a compound. The measurement of Atomic Mass was thus a historic challenge that had to be overcome, and the story of the ways that scientists met this challenge is an intriguing one.

For the source and more detailed information concerning this subject, click on the related links section (Answers.com) indicated below Isotopes are any of the different species of atom (Nuclides) of a chemical element each having different atomic mass (mass number).[1] Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons. Therefore, isotopes have different mass numbers, which give the total number of nucleons, the number of protons plus neutrons. For the source and more detailed information concerning this subject, click on the related links section (Wikipedia) indicated below.

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13y ago

Isotopic mass is due to the amount of neutrons in an atom. As neutrons have no charge, it only changes the mass of an atom. A variation in the number of neutrons of an element will only change the mass of an atom, and will not effect the atomic number because this is based on the number of protons.

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14y ago

relative isotopic mass - it is the ratio of the mass of one atom of that isotope to a twelfth of the mass of one atom of carbon-12.

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The mass of an atom of an isotope compared with one-twelfthof the mass of an atom of carbon-12.

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Q: What is isotopic mass?
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What is the isotopic mass of phosphate?

The most common isotopic mass of the phospate group, PO3, is 79. The second most common isotopic mass is incredibly rare, but is 78. -------------------------------- Phosphate (PO4)3- has not an isotopic mass because it is not an isotope but it is an anion. The mass of this anion is 94,953 42.


What element has the isotopic mass of 209?

Po


Which gas is heaviest nitrogen hydrogen or oxygen?

Isotopic mas of hydrogen ia '1' Isotopic mass of nitrogen is '14' Isotopic mass of oxygen is '16' It follows that oxygen is the n=heaviest of these gases.


How do you calculate isotopic masses?

The atomic mass of isotopes is determined by mass spectrometry.


What relationship exist between the atomic mass and the isotopes?

When atomic mass is expressed in unified atomic mass units, it is similar to isotopic mass and has the same numerical value as that of atomic mass. The atomic mass or the relative isotopic mass is the mass of one atom which at a time can be only one isotope.


How is average weight of atomic mass computed?

the average atomic mass is computed by summing all isotopic weights of the isotopes of that element and then dividing this by the the total number of isotopes of that element (note that isotopic mass is exactly the same as atomic weight, except for isotopes).


How do you determine when isotopes are most abundant?

Isotopic composition is determined by mass spectrometry.


What is the average atomic mass of the element with the isotopic abundances shown?

90.7 amu


What is meant by isotopic effect?

the variton of transition temperature with respect to mass of iostopic electrons


What is the atomic mass of B if 19.9 percent of all B atoms have a mass of 10.01 amu and 80.1 percent have a mass of 11.01 amu?

Given : Atomic mass of B = 10.01 amu , % = 19.9 let it be A Atomic mass of B = 11.01 amu , % = 80.1 Solution : A and B are approximately in the ratio 1:4. Isotopic mass = [(proportion of A X at. mass of A) + (proportion of B X at. mass of B)] / 4 = [(1 X 10.01) + (4 X 11.01)] / 4 = (10.01 + 44.04) / 4 = 54.05 / 4 Isotopic atomic mass = 13.512 amu ---- Therefore, isotopic atomic mass of B is = 13.512 amu.


What is isotopic weight in chemistry?

The correct expression is "atomic mass of the isotope"; it is related to 1/12 of the mass of the isotope carbon-12.


What is the difference between relative isotopic mass and relative atomic mass?

Atomic Mass is the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.Relative atomic mass is the ratio of the average mass of one atom of an element to one twelfth of the mass of an atom of carbon-12.Relative isotopic mass is the mass of an atom of an isotope of an element compared with one-twelfth the mass of an atom of carbon-12.Thus an element will have ONE Relative Atomic Mass but there may be MANY individual Relative Isotopic Masses for an Element (depending on how many Isotopes it has).