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The atomic mass of an atom is equal to the sum of the numbers of?
Wiki User
∙ 8y ago
The Atomic Mass number of an element is the sum of the protons and neutrons in the nucleus of an atom of that element.
The relative atomic mass is the average atomic mass number of all the known isotopes of an element.
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoThe atomic mass of an atom is roughly the sum of the number of proton and neutrons it contains. But for the correct mass you also need to consider:
- the binding energy of the protons and neutrons (largest correction factor)
- the masses of the electrons
- the binding energy of the electrons (smallest correction factor)
These correction factors become quite large for heavier atoms. The binding energy of the protons and neutrons is very challenging to predict in theory. This means, we don't have a good model for predicting the masses of heavy atoms.
On the other hand, measurements of the atomic masses are so exact nowadays (1 part in 10^12 for some stable atoms!), that you can even see if the electrons of the atom are excited or not!
The atomic mass of an atom is egaul to the sum of the numbers of protons and neutrons!!
Wiki User
∙ 13y agoThe atomic mass NUMBER of an atom is equal to the sum of the protons and neutrons of the atom.
The atomic mass of an atom is the total mass of the electrons, protons, and neutrons in a motionless atom.
Wiki User
∙ 12y agoMass number is the sum of the protons and neutrons in the nucleus of the atoms of an isotope.
Wiki User
∙ 8y agoThe mass number of an atom is obtained by totaling the number of protons and neutrons.
Wiki User
∙ 7y agoThe mass number is the sum of protons and neutrons in the atomic nucleus.
Wiki User
∙ 13y agoThe number of protons.
Wiki User
∙ 9y agoProtons & neutrons
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What is atomic mass of an atom equal to?
The atomic mass of an element is equal to the number of protons.
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.
Why atomic mass is different from the mass numbers?
atomic mass is the number of protons in an atom mass number is the number of protons plus neutrons in an atom
What is the atomic mass of an atom if its mass is approximately one third that of carbon 12?
The atomic mass number of an atom, if the atom's mass number is approximately equal to 0.33 that of carbon-12, would be 4. If the question is about actual masses rather than mass numbers, the mass of a helium-4 atom is about 4.00260 atomic mass units, while the mass of a carbon-12 atom is, by definition, exactly 12.000..... atomic mass units.
What number is the atomic mass equal to?
Atomic mass is the number of protons and neutrons in an atom.
The atomic mass of an atom is equal to the sum of numbers of what?
protons + electrons= atomic mass NUMBER, not the atomic mass.
What is atomic mass of an atom equal to?
The atomic mass of an element is equal to the number of protons.
Is the mass number of an atom equal to the atomic number?
Only if the atom is hydrogen-1! The mass number of the atom is equal to the sum of the numbers of protons, which is the same as the atomic number, plus the number of neutrons. The only non-radioactive atom without neutrons is hydrogen-1.
Why doest the atomic number equal the atomic mass?
atomic mass is contributed mainly by protons and neutrons. it is the mass of an atom. atomic number on the other hand is contributed by protons and is equal to the number of protons in the atom
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 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 atomic mass is equal to the atom on the periodic table?
number of protons = atomic mass
What do atomic number and atomic mass mean?
The atomic number is equal to either the number of electrons or the protons of a particular atom. The atomic mass in a.m.u. is equal to the sum of protons and neutrons in an atom.
Why atomic mass is different from the mass numbers?
atomic mass is the number of protons in an atom mass number is the number of protons plus neutrons in an atom
What is the atomic mass of an atom if its mass is approximately one third that of carbon 12?
The atomic mass number of an atom, if the atom's mass number is approximately equal to 0.33 that of carbon-12, would be 4. If the question is about actual masses rather than mass numbers, the mass of a helium-4 atom is about 4.00260 atomic mass units, while the mass of a carbon-12 atom is, by definition, exactly 12.000..... atomic mass units.
What best describes the number of neutrons in an atom?
It is equal to the difference between atomic number and Atomic Mass number. A+
The atomic mass of an atom is equal to?
the total mass of its protons, neutrons, and electrons.
