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Atomic Mass
Atomic mass is the mass of protons, neutrons, and electrons in a single specific atom.
1,752 Questions
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.
Why does iodine have alower average atomic mass that tellurium?
It has a lower atomic number because it has less protons in the nucleus, it has a lower mass number because it has less neutrons and protons in the nucleus. Electrons aren't considered in any of these numbers because they only weigh about 1/2000 of a proton - they are almost weightless, even compared to an atom.
Why atomic mass of chlorine is 35.5?
Because chlorine atoms occur as two isotopes: 35Cl and 37Cl. The first accounts for 75.76% of chlorine and the second for the rest so the [weighted] average mass is(75.76*35 + 24.24*37)/100 = 35.48 = 35.5, approx.
What is the atomic mass of ruthenium?
The atomic mass of ruthenium (Ru) is approximately 101.07 atomic mass units.
What is the difference between atomic mass and relative atomic mass?
Atomic mass is the measure of a mass of one atom in relation to 1/12 mass of Carbon 12 atom and measured in atomic mass unit(amu) or Dalton unit or grams/mol.
Relative atomic mass is also the relative mass but does not have a unit but a ratio number.
The atomic mass number of Sulfur is 32.066. Atomic number: 16. Symbol: S
How do the atomic mass numbers of different isotopes of an element compare?
The different isotopes have different atomic mass numbers, because the isotope has different numbers of neutrons. The protons and electrons are the same, so the change in mass number is the same as the change in the number of neutrons.
What does the atomic absorption spectra of lanthanum look like?
http://www.cjass.ca/conv49n4.html Ref : The Electronic Absorption Spectra of Lanthanum (III), Cerium (III)and Thorium (IV) Ions in Different Solvents Rafie H. Abu-Eittah*, Sayed A. Marie and Mabrouka B. Salem. Canadian Journal of Analytical Sciences & Spectroscopy Received: May 19, 2004 Accepted (in revised form): August 2, 2004 See the Web Links to the left of this answer for a direct link to the pdf of this article.
What is Carbon-12 atomic mass?
12. The number 12 refers to the atomic mass. More precisely, to the sum of neutrons + protons; but this is usually close to the atomic mass. In the case of carbon-12, it is exact, by definition.
An element's atomic mass number is?
It is about neutrons and protons. The total of neutrons and protons.
What do you have when you subtract the atomic no from atomic mass?
Atomic number is number of protons in an atom while atomic mass is the sum of protons and neutrons in an atom when you subtract you will get the number of neutrons in an atom.
What is the atomic mass of an atom with 5 electrons?
you can't tell the atomic mass of an atom if either the number of protons or neutrons is missing. But Boron with 5 protons and 6 neutrons has and atomic mass of 11.
Is it true that The atomic mass is equal to the atomic number?
No, the atomic mass is not equal to the atomic number. The atomic number represents the number of protons in an atom's nucleus, while the atomic mass is the sum of protons and neutrons in the nucleus. The atomic mass can differ from the atomic number, especially due to the presence of neutrons.
What is the atomic mass number of an atomic number 5 and includes 6 neutrons?
It boron element. Atomic mass of it is 10.8.
What is the average atomic mass of an element with two isotopes of 220 and 250?
To calculate the median atomic weight, the relative abundance of each isotope could be calculated or given.
