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Can explain in terms of isotopes why the relative atomic mass of atomic number 17 is not a whole number?
Wiki User
∙ 12y ago
Mass number is the average of all the naturally occurring isotopes of that element. When calculated, this average is not a whole number.
Wiki User
∙ 12y ago
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Atomic mass differnet from the atomic mass number why is that?
The atomic mass is an average, allowing for the relative abundances of different isotopes.
Why is the relative atomic mass of an atom in a fraction?
It's an average number allowing for the relative abundances of different isotopes.
How do you find one mass number when the relative Atomic number is given?
In the Handbook of Chemistry and Physics (and in many other references), there is a "Table of Isotopes" that lists all known isotopes, first by atomic number and then by increasing mass number.
Why is the atomic mass of fluorine not 19.000?
It's an average number allowing for the relative abundances of different isotopes.
Why is atomic mass usually in fraction?
It's an average number allowing for the relative abundances of different isotopes.
Why is atomic mass always a fraction?
It's an average number allowing for the relative abundances of different isotopes.
What does the relative atomic mass of an element tell us about the relative abundance of an isotope?
None. The relative abundance of isotopes is used to calculate the Average Mass (by multiplying the Atomic Mass of the isotopes by their relative abundancies and adding the products together) while the Atomic Mass is simply the number of protons plus the number of neutrons.
What atoms with same atomic number but different atomic masses?
Isotopes of the same element have the same number of protons (atomic number) but differ in number of neutrons (hence atomic masses).
Atoms of same chemical element that have different atomic mass are known as?
Isotopes. They differ in the number of neutrons in the nucleus.
The number of an atom is obtained by totaling the number of?
The Atomic Mass number of an element is the sum of the protons and neutrons in the nucleus of an atom of that element.The relative atomic mass is the average atomic mass number of all the known isotopes of an element.
Atomic mass is equivalent to the number of?
The atomic mass is the mass of an atom of that element in AMUs. (Atomic Mass Units)The atomic number, however, is equivalent to the number of protons in an atom of that element.The mass number of an atom is the total number of protons and neutrons in the nucleus of an atom. This is therefore always a whole number. The relative atomic mass of an element is the weighted average of the masses of the isotopes relative to 1/12 of the mass of a carbon-12 atom.It is a weighted average as it takes into account the relative abundances of the different isotopes (atoms of the same element but with different numbers of neutrons) of an element. This number is found in the periodic table.For example chlorine has two isotopes, 35Cl and 37Cl, in the approximate ratio of 3 atoms of 35Cl to 1 atom of 37Cl.The number of protons and neutrons in a 35Cl atom must add up to 35, the mass number. The relative atomic mass of chlorine takes into account both isotopes and is therefore 35.5.
How do you calculate the atomic mass of an element with different isotopes?
To calculate average atomic mass from different isotopes of an element, we take into account the relative atomic masses of isotopes and their relative abundance on Earth. The following formula is used to calculate the needful : atomic mass = mass of isotope x percent abundance + mass of isotope x percent abundance / 100 (whole expression divided by 100)
