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Why do elements which exists as isotopes have fractional atomic mass?
Wiki User
∙ 9y ago
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)
Pearline Blick
Wiki User
∙ 13y agoEach 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)
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What is the atomic mass of radon?
The relative atomic mass of radonis indeterminiate because this element is relatively short lived and exists only as a transient decay product.
Average atomic mass of copper is 63.5 amu It exists as two isotopes and Calculate the percentage and ratio of copper isotopes?
Let percentage of = xPercentage of = 100 -xFrom above, average atomic mass= amuBut given average atomic mass = 63.5 amuTherefore,Percentage = 75Percentage of = 100 -75 =25Ratio of and = 75:25=3:1source : www.examville.com
What is the atomic mass of Venus'?
No element name Venus exists. Elements' name derived from planets are Mercury, Uranium, Neptunium, and Plutonium
Which member of group 7 that exists as 2 isotopes?
Chlorine
How is nitrogen used by humans?
Ammonia, nitrates, nitrites
Is the atomic mass of an element equaled to the mass of an average atom?
The atomic weight is taken as the average weight or mass of the different isotopes of the Same atom That exists in the different %age in our enviromenT
What same elements have the same atomic number?
though your question is unclear, each element has its own atomic number. every sample of Sulfur (S) that exists has the atomic number of 16. No different elements share the same atomic number.
What is the atomic mass of radon?
The relative atomic mass of radonis indeterminiate because this element is relatively short lived and exists only as a transient decay product.
What are the four element that have atomic number less than 8?
There are seven elements with atomic number less than 8: hydrogen, helium, lithium, beryllium, boron, carbon, and nitrogen. I don't know where you got the notion that there were only four. I thought you might be thinking of atomic mass instead, but that doesn't work either ... there are only 3 elements that have stable isotopes with a mass below 8 amu (hydrogen, helium, and lithium). 7Be exists, but it's radioactive.
Average atomic mass of copper is 63.5 amu It exists as two isotopes and Calculate the percentage and ratio of copper isotopes?
Let percentage of = xPercentage of = 100 -xFrom above, average atomic mass= amuBut given average atomic mass = 63.5 amuTherefore,Percentage = 75Percentage of = 100 -75 =25Ratio of and = 75:25=3:1source : www.examville.com
Why can atoms have more than one mass number but only one atomic number?
Each atom exists in nature with varying numbers of neutrons (isotopes), but each atom has a definite number of protons (atomic number).
Why are atomic masses of elements usually not whole numbers?
The atomic mass listed in the periodic is found by taking the average of all the different isotopes of a given element found in nature, weighted for their natural abundance.Note that the atomic mass is not the same as the atomic weight. The atomic mass is the weight of one specific isotope of one atom, and is expressed in "atomic mass units" or amu. The atomic weight is expressed in grams per mole (g/mol) and is the weighted average of all the isotopes weighted by their abundance.See the Web Links for more information about atomic mass and atomic weight.
Why is co placed before ni on the periodic table?
Keep in mind that the atomic mass of an element is based on an average of relative abundance of stable isotopes. Nickel has several stable isotopes and Cobalt I believe has only one stable isotope. The weighted average proportionally to the relative abundance of the several Nickel isotopes is less than the average of Cobalt's isotope(s). So basically Though Nickel has a greater atomic number and the trend is for this to correlate with atomic mass because nickel exists in relatively large proportion as a lighter stable isotope Nickels average atomic mass is less than Cobalt's atomic mass. Google about relative abundance and calculating atomic mass to find all sorts of interesting things!
What do you get when you combine 3 neons?
Neon is chemically inert and does not combine with other elements (including itself). It exists as a mono atomic gas.
What is the atomic mass of Venus'?
No element name Venus exists. Elements' name derived from planets are Mercury, Uranium, Neptunium, and Plutonium
Which member of group 7 that exists as 2 isotopes?
Chlorine
How is nitrogen used by humans?
Ammonia, nitrates, nitrites
