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The atomic weight (not mass) of a chemical element is the ratio between the average mass of the atoms of this element to 1/12 from the Atomic Mass of carbon-12.

The atomic mass is a term applied only to specific isotopes; the unit is the same as above. Is a value denoting the total mass of all the protons, neutrons, and electrons in an isotope.

The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.

The atomic number, on the other hand, tells us how many protons are in the nucleus of an atom.

IUPAC publish periodically tables of atomic weights - the last edition is from 2009-2010.

For the atomic masses of isotopes the last published edition is The AME 2003 atomic mass evaluation, edited by Audi, Wapstra and Thibault.

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Q: The atomic mass tells the number of?
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What does the atomic mass tell you?

It tells you the average amount of protons and neutrons within the nucleus of an atom. In other words, atomic mass - atomic number (protons)= the number of neutrons within the nucleus.


What does the atomic mass tell us?

it tells us that the number is equal to the number of protons plus the number of nuetrons in the nucleus of an atom


What is the relationship btw atomic mass and atomic mass number?

We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.


What can the atomic mass tell you?

The atomic weight (not mass) of a chemical element is the ratio between the average mass of the atoms of this element to 1/12 from the atomic mass of carbon-12.The atomic mass is a term applied only to specific isotopes; the unit is the same as above. Is a value denoting the total mass of all the protons, neutrons, and electrons in an isotope.The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.The atomic number, on the other hand, tells us how many protons are in the nucleus of an atom.IUPAC publish periodically tables of atomic weights - the last edition is from 2009-2010.For the atomic masses of isotopes the last published edition is The AME 2003 atomic mass evaluation, edited by Audi, Wapstra and Thibault.


Why is the atomic mass number not a whole number?

We can find Atomic Mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.

Related questions

What is the atomic mass number?

The atomic mass number tells how many protons and neutrons are in a nucleus.


How is atomic number better than atomic mass?

Atomic Number tells you how many protons and electrons there are in a neutral atom.


Tells you the number of atoms in each element?

atomic mass is the answer


What determines the atomicity of the elements?

The Atomic Mass number tells the atomic mass of an element. The mass is calculated as the mass of all the protons and neutrons in the center of an atom.


How can you figure out how many neutrons are in an atoms nucleus by using the atomic number and the atomic mass?

The atomic mass (rounded to the nearest whole number) is the number of nucleons - i.e. protons+neutrons. The atomic number is just the number of protons. So the difference between the two (mass minus number) tells you the number of neutrons.


What does the atomic mass and number tell you about an atom?

The atomic weight (not mass) of a chemical element is the ratio between the average mass of the atoms of this element to 1/12 from the Atomic Mass of carbon-12.The atomic mass is a term applied only to specific isotopes; the unit is the same as above. Is a value denoting the total mass of all the protons, neutrons, and electrons in an isotope.The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.The atomic number, on the other hand, tells us how many protons are in the nucleus of an atom.IUPAC publish periodically tables of atomic weights - the last edition is from 2009-2010.For the atomic masses of isotopes the last published edition is The AME 2003 atomic mass evaluation, edited by Audi, Wapstra and Thibault.


What does the atomic mass of an atom tells you?

- It tells you what number it is on the periodic table of elements.- The number of protons in the nucleus (centre of the atom)- And the number of elecrons orbiting around the atomthe 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.


The atomic mass tells you how many?

The atomic weight (not mass) of a chemical element is the ratio between the average mass of the atoms of this element to 1/12 from the atomic mass of carbon-12.The atomic mass is a term applied only to specific isotopes; the unit is the same as above. Is a value denoting the total mass of all the protons, neutrons, and electrons in an isotope.The mass number tells us the number (the sum) of protons and neutrons in the nucleus of an atom.The atomic number, on the other hand, tells us how many protons are in the nucleus of an atom.IUPAC publish periodically tables of atomic weights - the last edition is from 2009-2010.For the atomic masses of isotopes the last published edition is The AME 2003 atomic mass evaluation, edited by Audi, Wapstra and Thibault.


How is atomic weight different than an atomic number?

atomic weight goes up faster


What does the letter A symbolizes in physics?

In Nuclear Physics, A stands for atomic mass number. Atomic number is the number of protons and neutrons present in the nucleus of a given atom. Basically it tells us about the mass of the atom, as nucleons are the only sub-atomic particles which have mass. Nucleons mean neutrons and protons.


What does the atomic mass tell you about parts of the element?

It tells you how many protons are in the element. For example if the atomic number is 5 then the protons of the element is 5.


What do you do with an atomic number and an atomic mass?

The atomic number is the number of a chemical element in the periodic table of Mendeleev; the atomic number is equal to the number of protons and electrons. The atomic mass is the mass of an atom expressed in relative atomic mass units.