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How is the mass number of an isotope different from the average atomic mass that is on the periodic table?
Wiki User
∙ 8y ago
The mass number for a particular isotope of an element is a precise value.
The average Atomic Mass for an element is the value you would measure for that element given all the isotopes it has and their abundance in the sample.
Wiki User
∙ 8y ago
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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 the average atomic mass of an element is the average atomic masses of what kind of isotopes?
average atomic massof an element=(Atomic mass of first isotope X % of that isotope) + (Atomic mass of second isotope X % of the second isotope)
Why is the atomic mass of sulfur listed on the periodic table not a whole number?
The atomic mass given on the periodic table is a weighted average of all the isotopes, weighted by abundance of each isotope
Why is the average atomic mass included in the periodic table?
The average atomic mass is included in the periodic table due to the varying amounts of isotopes that exist on the planet for each atom. Because isotopes of atoms have a different weight than the original, the atom can be found weighing different amounts depending on how much of the isotope is present. These ratios in isotope amounts change over time. The average atomic mass of Carbon on a table from the 1960's will not be same as the mass on a table from 2000's. Although these changes will be small, in calculations they can add up to significant differences in results.
Mass number Why is it not the number on the periodic table?
Elements have different isotopes and each isotope will have different atomic mass. As such it is not possible to list the mass number of all the isotopes on the periodic table. However, the atomic mass is generally given on the periodic table which is generally calculated taking into account all the isotopes and its percentage.
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 the average atomic mass of an element is the average atomic masses of what kind of isotopes?
average atomic massof an element=(Atomic mass of first isotope X % of that isotope) + (Atomic mass of second isotope X % of the second isotope)
Why is the atomic mass of sulfur listed on the periodic table not a whole number?
The atomic mass given on the periodic table is a weighted average of all the isotopes, weighted by abundance of each isotope
Why is the average atomic mass included in the periodic table?
The average atomic mass is included in the periodic table due to the varying amounts of isotopes that exist on the planet for each atom. Because isotopes of atoms have a different weight than the original, the atom can be found weighing different amounts depending on how much of the isotope is present. These ratios in isotope amounts change over time. The average atomic mass of Carbon on a table from the 1960's will not be same as the mass on a table from 2000's. Although these changes will be small, in calculations they can add up to significant differences in results.
How would the modern periodic table would be different if elements were arranged by average atomic mass instead of by atomic number?
how would the modern Periodic Table be different if elements were arranged by average Atomic Mass instead of by atomic number
What is the average neutrons in ununpentium?
For each isotope the number of neutrons is different. Number of neutrons = Mass number of an isotope – atomic number
What is the numerical setup for calculating the average atomic weight of carbon?
The general formula for calculation is:Atomic weight = (atomic mass of the isotope a X fraction of the isotope a) + (atomic mass of the isotope b X fraction of the isotope b) + .......(atomic mass of the isotope n X fraction of the isotope n)Don't confuse atomic weight with atomic mass, mass number or atomic number.For carbon:Atomic weight = (12 x 0,9893) + (13,0033548378 x 0,0107) = 12,0107After IUPAC tables from 2009 the atomic weight of carbon is writed as[12,0096; 12,0116].
Mass number Why is it not the number on the periodic table?
Elements have different isotopes and each isotope will have different atomic mass. As such it is not possible to list the mass number of all the isotopes on the periodic table. However, the atomic mass is generally given on the periodic table which is generally calculated taking into account all the isotopes and its percentage.
How do you find the atomic mass and the atomic number?
The atomic number is the whole # on the periodic table or the # of protons in an atom. The atomic mass is the # that is not the whole # on the periodic table, or you can multiply the mass of the isotope by its abundance and add the answers together.
Why need to know the percentage of each isotope of an element to determine the atomic mass?
Because each isotope of an element has a mass different from any other isotope of the same element, and the atomic mass of an element is an average, weighted by the proportion of each isotope, in the naturally occurring element.
What number represents the mass number?
The mass number indicates the sum of the number of protons and neutrons of the isotope. The mass number, nucleon number or atomic mass indicated about the respective chemical symbols in the periodic table are average figures based on the different isotopes and their relative abundance. That is why there are decimals in mass numbers in the periodic table. It can be used to compare the relative atomic masses of different atoms.
What are the number of protons in an every isotope?
There is no set number of protons in an isotope. The definition of an isotope is an atom that has the same number of protons but a different number of neutrons. Therefore, the answer to the question is; the number of protons in an isotope remain the same. To know the number of protons, look at the Periodic Table. The Atomic Number is the number of protons. Don't confuse that with Atomic Mass - To confirm, the Atomic Numbers for Hydrogen and Helium are 1 and 2.
