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# What does the atomic weight of an element tell us about it?

Updated: 8/10/2023

Wiki User

14y ago

The atomic number tells us the number of protons in the nucleus of an atom. The Atomic Mass tells us the sum of the protons and neutrons in a nucleus.

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.

Wiki User

12y ago

Wiki User

14y ago

Atomic weight is used to calculate the number of neutrons in an atom of an element. The number of neutrons is equal to the atomic weight minus the atomic number (the number of protons).

The atomic mass of an element is also a weighted average of all of the masses of all of the isotopes of that element.

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Q: What does the atomic weight of an element tell us about it?
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### What does the atomic number tell us about an element?

The atomic number is the number of protons in the nucleus.The Atomic Number of an element helps us to locate that particuarler element on the Periodic Table of Elements.

### What does an element's atomic mass tell us about the atoms that make up that element?

atomic mass is the no. of protons+no. of nuetron

### What does the atomic number tell us about calcium?

Calcium is a metal element. Atomic number of it is 20.

### What does the atomic number number tell us about an elements?

The atomic number is the number of protons in the nucleus.The Atomic Number of an element helps us to locate that particuarler element on the Periodic Table of Elements.

### What are the word to be used to fill these empty spaces an element's atomic ----- tells us how ----- each atom is?

what are the word to be used to fill these empty spaces an element's atomic tell us how each atom is

### 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 does the atomic number tell us about an atoms?

Atomic number, being a characteristic property (property that is diff. for each element), it identifies the element, For instance, Oxygen has an atomic number of 8, and it's the only one that has that atomic number, same with any other element, except that no other element has an atomic # of 8. No two elements can share an atomic number.

### What does an element's atomic number tell us?

The atomic number is the number of protons that the element has.

### What does the atomic number of the atom tell us?

Atomic number, being a characteristic property (property that is diff. for each element), it identifies the element, For instance, Oxygen has an atomic number of 8, and it's the only one that has that atomic number, same with any other element, except that no other element has an atomic # of 8. No two elements can share an atomic number.

### What are the atomic numbers and atomic mass?

Atomic Number :- atomic number of an element is the number of protons present in the nucleus of the atom. (since atoms are electrically neutral the number of protons in an atom is equal to the number of electrons in an atom) Atomic Mass :- atomic mass of an element is the number which tells us how many times an atom of that element is heavier than an atom of hydrogen (whose atomic weight is taken as unity [1])

### What does a mass spectrometer tell us in an atom or an element?

The relative atomic weight or standard 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.

### What do the atomic and mass number of an atom tell us?

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 is the sum of nucleons (protons and neutrons) in the atomic nucleus.