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- The mass of an atom is measured in Atomic Mass units; this unit (non SI) is 1/12 from the atomic mass of the isotope carbon-12.
- Using SI units: mass of an atom = atomic mass of the isotope/Avogadro constant
- After the IUPAC rules for elements is used the expression atomic weight and for isotopes atomic mass.
Wiki User
∙ 6y ago
Wiki User
∙ 15y agoAlmost all the mass in an atom is contained in the baryons, or heavy particles, in its nucleus. These are the protons and neutrons which give the atom its atomic weight. The electrons around the nucleus have mass but it is negligible compared to that of the baryons in the nucleus.
Wiki User
∙ 14y agoif you look at the Periodic Table it lists all of the elements from left to right. if you look closer there is something called the "atomic number." this is the average of the mass of an atom in one element. it is different for every element and no two atoms have the exact same atomic number.
Wiki User
∙ 14y agoIt is the sum of number of protons and number of neutrons
Wiki User
∙ 11y agoThe
atom's mass is in the nucleus :)
Except for the small mass of the electrons,of course,which are
not in the nucleus.
Wiki User
∙ 14y agoThe mass an atom is found in the nucleus, the center of the atom. The formula for caluculating mass is the number of protons + neutrons.
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Average mass of one atom of an element?
what is the atomic mass of an element : atomic mass is equal to the number of protons and number of neutrons present in an element
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).
What does 4.00 stand for in the periodic table?
In the periodic table, the number 4.00 typically refers to the atomic mass of an element. It represents the average mass of one atom of that element relative to the mass of a carbon-12 atom which is arbitrarily defined as 12.
What is the atomic mass of an element?
The atomic mass of an element is the weight of the constituent atomic paraticles in an atom of a given isotope. The atomic weight is the weighted average mass for atoms in a naturally occurring sample of the element.Almost all of an atom's mass is found in the nucleus, consisting of protons and neutrons.
Do the elements in the periodic table have the same mass?
No! The mass of one atom of each element increases as you move down and to the right on a periodic table. The mass of an atom of a particular element is called its atomic mass.
Why atomic mass of atom is defined as relative atomic mass?
It is calculated as the ratio of the mass of one atom of an element to one twelfth of the mass of an atom of carbon-12. In fact, the weighted average of the mass of an atom of an element - weighted according to its isotopic abundance.
Why atomic mass of an atom is define as relative atomic mass?
It is calculated as the ratio of the mass of one atom of an element to one twelfth of the mass of an atom of carbon-12. In fact, the weighted average of the mass of an atom of an element - weighted according to its isotopic abundance.
Why is atomic mass of an atom is defined as relative atomic mass?
It is calculated as the ratio of the mass of one atom of an element to one twelfth of the mass of an atom of carbon-12. In fact, the weighted average of the mass of an atom of an element - weighted according to its isotopic abundance.
Why atomic mass of an atom is defined as relative atomic mass?
It is calculated as the ratio of the mass of one atom of an element to one twelfth of the mass of an atom of carbon-12. In fact, the weighted average of the mass of an atom of an element - weighted according to its isotopic abundance.
What is relationship between atomic mass and average atomic mass?
The average 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. It is, the mass of an atom of the substance, rescaled so that carbon-12 would have a mass of 12.
Average mass of one atom of an element?
what is the atomic mass of an element : atomic mass is equal to the number of protons and number of neutrons present in an element
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).
What is the average mass of the atoms element?
The average atomic weight (not mass for elements) of a chemical element is calculated taking into account the isotopic composition of this element and the atomic masses (not weight for isotopes) of these isotopes.
What does 4.00 stand for in the periodic table?
In the periodic table, the number 4.00 typically refers to the atomic mass of an element. It represents the average mass of one atom of that element relative to the mass of a carbon-12 atom which is arbitrarily defined as 12.
What is the atomic mass of an element?
The atomic mass of an element is the weight of the constituent atomic paraticles in an atom of a given isotope. The atomic weight is the weighted average mass for atoms in a naturally occurring sample of the element.Almost all of an atom's mass is found in the nucleus, consisting of protons and neutrons.
Is the sum of the numbers of protons and the number neutrons in an atom is the mass number?
It is the mass number for that particular form of the atom - that particular isotope. An element can exist as more than one isotope and the atom's mass number is the (weighted) average of the mass numbers of all its isotopes.
Do the elements in the periodic table have the same mass?
No! The mass of one atom of each element increases as you move down and to the right on a periodic table. The mass of an atom of a particular element is called its atomic mass.
