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The current definition amounts to 1/12 the mass of a carbon-12 atom. In the past (prior to 1961) it's had other definitions, sometimes depending on what field of study the author was in (for a while chemistry and physics defined it differently), so if you're dealing with historical data you've got to be careful.
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∙ 12y ago
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∙ 11y agoThe Atomic Mass of an atom consists of the sum of the masses of the protons, neutrons, and electrons. The unit for atomic mass is the amu, which means atomic mass unit. This should not be confused with the mass number of an isotope, which is the sum of the protons and neutrons in the nucleus of an atom.
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∙ 14y agoThe total number of protons and neutrons in the nucleus. Each has a nominal mass of 1. So the mass of hydrogen, with one proton and no neutrons in its nucleus has a mass of 1.
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∙ 12y agoA.m.u. approximately equals the mass of one proton or one hydrogen atom.
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∙ 11y agoOne-twelfth the mass of a carbon-12 atom or 1,660538921(73)×10−27 kg.
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∙ 12y agoThe weight of atom
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∙ 10y agoProtons and neutrons it contains.
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∙ 9y agoB
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∙ 14y agoa proton
Anonymous
a single proton
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Is atomic mass and atomic diameter the same thing?
No, the atomic mass is the average mass of the atom and the atomic diameter is the average diameter of the atom
How is an atomic number similar to mass number?
The nucleus of an atom consists of protons and neutrons. The number of protons in a particular nucleus is its "atomic number". The total number of protons and neutrons in a particular nucleus is its "mass number".
What does atomic mass represent of an element represent?
Atomic Mass represents the mass of atom. We use mass of protons and neutrons.
Atomic mass of an atom is called?
What do you mean? Atomic mass of an atom is the weighted average mass of all the naturally occurring isotopes of that element, measured in amu (=atomic mass unit). I do not know how do you want to call it, it is just atomic mass, average atomic mass, mass of an atom, atom's mass...
Is it true that The atomic mass is equal to the atomic number?
No, the atomic mass number is the number of protons plus the number of neutrons. The atomic mass of an atom is the total mass in a motionless atom.
What is the atomic mass of an atom consists of the mass?
the mass of an atom is concentrated in a very small central portion of the atom which is called the atomic nucleus. The atomic nucleus is made up of nucleons, of which there are two important fundamental types: electrically positive protons and electrically neutral neutrons. So the Answer for the question is: Neutrons and Protons.
Is the atomic mass and number the same thing?
No, the atomic mass consists of protons, but the atomic mass consists of both protons and neutrons.
How do you determine the atom the atomic mass of an atom?
Proton + Nuetron = Atomic Mass
What is the atomic mass of an atom?
The atomic mass of an atom is the combined mass of the protons and neutrons in the nucleus.
Is atomic mass and atomic diameter the same thing?
No, the atomic mass is the average mass of the atom and the atomic diameter is the average diameter of the atom
How is an atomic number similar to mass number?
The nucleus of an atom consists of protons and neutrons. The number of protons in a particular nucleus is its "atomic number". The total number of protons and neutrons in a particular nucleus is its "mass number".
What is the number of neutrons in an atom affects the atomic what?
The number of neutrons in an atom can affect the atomic mass of an atom.
What does atomic mass represent of an element represent?
Atomic Mass represents the mass of atom. We use mass of protons and neutrons.
The atomic mass of an atom is the?
The atomic mass of an atom is the mass of 6.011 X 10^23 atoms of that element.
Atomic mass of an atom is called?
What do you mean? Atomic mass of an atom is the weighted average mass of all the naturally occurring isotopes of that element, measured in amu (=atomic mass unit). I do not know how do you want to call it, it is just atomic mass, average atomic mass, mass of an atom, atom's mass...
Is it true that The atomic mass is equal to the atomic number?
No, the atomic mass number is the number of protons plus the number of neutrons. The atomic mass of an atom is the total mass in a motionless atom.
What are the differences between atomic number and atomic mass?
Atomic mass is the mass of an atom in atomic mass units, and includes protons, neutrons, and electrons; and atomic number is the number of protons in the nucleus of the atom.
