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Atomic masses are determined by mass spectrometry. The atomic number is identic with the number of protons in the atom - depends on position in the Periodic Table.

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Q: How were the atomic number and the atomic masses of the elements determined?
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Related questions

What is the relationship between the atomic number and the elements identity?

Every elements has atomic number, elements identity determined the number of protons in its nucleus.


What are elements determined by number?

You think probable to atomic number, equal to the number of protons in the atomic nucleus.


What is the basis of arranging the elements in the periodic table?

increasing atomic number and repeating properties


How are the abbreviations on the periodic table of elements determined?

by atomic number


How are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on peridoic table?

Elements are arranged in a periodic table by atomic number, lower on top and left. Atomic masses have no direct relationship to the arrangement of atoms, although generally atoms with higher atomic numbers will have higher atomic masses. (There are at least three exceptions for atoms with atomic numbers differing by 1.)


Why the atomic mass numbers listed for elements on the Periodic Table are not whole numbers.?

Why are atomic masses of elements not generally whole numbers? The atomic masses listed on the periodic table are a weighted AVERAGE of an element'sisotopes. ... An element's atomic number is the number of protons in its nucleus. Number of protons specifies atom type.


The ordering of the elements in the periodic table is determined?

Number of protons in the nucleus (=atomic number)


What Moseley determine in element?

He determined the number of protons of the elements, which is called the atomic number.


What determines the properties of elements?

the properties of elements are determined by the structures of their atoms.


What has different atomic masses?

Different atoms and elements that have different number of protns, neutrons and electrons.Duh!


Why the mass number of the same atom of an element is not constant?

Since you have isotopes of elements. Isotopes are elements with different number of neutrons hence why the different atomic masses for the same elements.


Are elements determined by protons?

Yes, it is the atomic number i.e. number of protons that determines an element's identity.