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it's Atomic Mass- e.g weight in protons and neutrons, electrons weigh virtually nothing
The number of nucleons (protons and neutrons) provides the number of the isotope. For example, 3H, called hydrogen-3 or tritium, has very nearly the same mass, and exactly the same isotope number, as 3He, or helium-3.
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∙ 14y ago
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∙ 8y agothe mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
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∙ 12y agoMass number - Atomic Number.
Mass number is actually on the top left corner of an element displayed and all it means is the sum of protons and neutrons (the relative mass of the atom, you might say, because the mass of electrons is negligible)
Atomic number gives the element its identity, i.e. it is the number of protons only.
In an element displayed, this is in the bottom left corner.
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∙ 14y agoAtomic number is determined by the number of protons, which equals the number of electrons. The number of neutrons, however, may vary, and it is the sum of the masses of the protons and neutrons that determines atomic mass.
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∙ 13y agoThe number of protons plus the number of neutrons in an atom equals the atomic weight. On the Periodic Table, the atomic weight is often given as a number with a decimal because the weight is the relative average of the weights of all the isotopes of that element.
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∙ 12y agoIt is based on diffusion, it is hard to explain diffusion because it is such a vast category.
Sorry
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∙ 11y agoProtons, neutrons and electrons
The tem atomic mass is applied to an isotope; for the element atomic weight is correct.
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∙ 15y agoThe mass number
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∙ 12y agoElectrovalent bonds
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∙ 14y agothat would be an element?? i dont know
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How many neutrons are in one atom?
The number of neutrons depends on the atom. In general, mass number = atomic number + number of neutrons.
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.
How many neutrons are in the atom of Hydrogen?
The number of neutrons in a hydrogen atom will depend on which isotope of hydrogen we consider. Not all hydrogen atoms have the same number of neutrons. The vast majority of hydrogen atoms (over 99.98%) have no neutrons at all. Some have 1 (and this is called deuterium) and some have 2 (called tritium). These two isotopes occur naturally but are rare, as can be seen.To determine the number of neutrons in an atom, you must use the mass number, which is the sum of the number of protons and the number of neutrons. Since the atomic number of the element (for H, the atomic number is 1) tells you the number of protons, you can find the number neutrons by subtraction.See the Related Questions to the left for how to count the number of protons, neutrons and electrons in any atom of any element.
What is the structure of the atom and the position of protons neutrons and electrons?
Protons and neutrons can be found in the centre of the atom in the nucleus. Electrons orbit round the nucleus in shells/orbits and are extremely small compared to the rest of the atom. Protons have a positive +1 charge and neutrons have no charge and are neutral. Electrons have a negative -1 charge. Protons and neutrons give the atom its mass. Each shell has a maximum number of electrons it can take. In the first shell it is 2. In all other shells (up to calcium) the maximum number is 8. An atom can gain or lose electrons, becoming what is known as an ion. An ion is nothing more than an electrically charged atom. Adding or removing electrons from an atom does not change which element it is, just its charge. The number of electrons equals the number of protons. The number of protons is the roton/atomic number. The number of neutrons can be found by subtracting the atomic mass from the atomic number (as the atomic mass it both the protons and neutrons combined.)
Define the term mass number?
Mass number is a value approximate to the number of protons (Atomic Number) plus the number of neutrons within an atom of the element considered. I say approximate as mass number takes into account the mass of the nucleus and not the actual number of protons and neutrons in the nucleus.
Atomic mass is determined by the number of protons plus the number of?
Atomic mass is determined by the number of protons and neutrons in an atom's nucleus.
What is the mass number of 10 protons and 10 neutrons?
20. the mass of an atom is determined by the sum of the number of neutrons and protons the atom has.
Is determined by the number of protons and neutrons in a atom?
Atomic mass.
What determines the isotopes of an atom?
Different isotopes of an atom are determined by the number of neutrons it contains.
How is the atomic mass determined?
Atomic Mass is the number of protons in an atom plus the number of neutrons in the same atom.
Can an atom be determined by knowing the number of neutrons?
No, only by the atomic number, also known as the number of protons.
The atomic mass of an atom is determined by the combined masses of its what?
The total number of protons plus the total number of neutrons
How can an atoms mass number be determined?
it is the sum of the protons and neutrons present in the nucleus of the atom.
How do you find the number of neutrons in an atom if that number is not told to you?
if you arent given the atomic numbert for an element - where could you find it?
What is the partice that determines the mass of an atom?
The atomic mass is mainly determined by the total number of protons AND neutrons.
Can the mass number of an element be used to determine the number of electrons in an atom?
No. The mass number can be used, however, to determine the number of neutrons. Electrons can only be determined by knowing the atom's charge.
What determine the atom mass?
Essentially an atom's mass is determined by its number of protons and neutrons, as mass of electrons is so minuscule relative the nucleus.
