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number of protons and number of neutrons
Nelda Stiedemann
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∙ 13y agoAn atom's nucleus is made up of protons and neutrons. Of all the subatomic particles, it is these nucleons that are the most massive, and as such, they contribute most to the mass of the atom. The measure of an atom's mass is defined by the amount of protons and neutrons in it's nucleus, the neutron being about the same mass as a proton, which is considered 1 Atomic Mass unit (1 AMU).
Wiki User
∙ 6y agoatomic mass is based on the number of the protons and neutrons in the atom
Wiki User
∙ 10y agoThe sum of masses of atomic particles: protons, neutrons and electrons.
Wiki User
∙ 9y agoThe number of protons and neutrons controls the weight of an atom.
Wiki User
∙ 11y agothe mass of protons plus the mass of neutrons (i.e., the mass of the nucleus)
Wiki User
∙ 11y agoThe vast majority of the mass of an atom is the nucleus which in all elements except hydrogen, is composed of protons and neutrons.
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What information does the percent composition of an atom in a molecule give?
The relative amount of mass an atom contributes to a molecule
What is the mass of an atom found by?
Mass of an atom = Mass of proton + Mass of neutron
Subatomic particle that contributes mass and a positive electrical charge to an atom?
The sub atomic particles to an atom are the proton (p), neutron (n). The p and n both contribute to atomic mass. The positive charge comes from the p and outside the atom in orbit is/are the electron with negligible mass, but negative charge.
Is an oxygen atom have twice the mass of a sulphur atom?
No. On average a sulfur atom is twice the mass of an oxygen atom.
What do neutrons add to an atom?
Neutrons add MASS to an atom.
What information does the percent composition in an atom in a molecule give?
The relative amount of mass an atom contributes to a molecule
What information does the percent composition of an atom in a molecule give?
The relative amount of mass an atom contributes to a molecule
What contributes to an atom's atomic number and to its mass number?
Atomic Number: Protons Mass Number: Protons + Neutrons
What subatomic particle or particles contributes the most to the mass of the atom?
These particles are protons and neutrons.
What is the mass of an atom found by?
Mass of an atom = Mass of proton + Mass of neutron
Subatomic particle that contributes mass and a positive electrical charge to an atom?
The sub atomic particles to an atom are the proton (p), neutron (n). The p and n both contribute to atomic mass. The positive charge comes from the p and outside the atom in orbit is/are the electron with negligible mass, but negative charge.
What represents most of an atom's mass?
The nucleus of an atom represents most of an atom's mass.
What particle contributes a negligible amount to the atomic mass?
There are a number of particles of particularly low mass. Electrons have much less mass than either protons or neutrons, and so are negligible in calculating the mass of an atom. However, electrons are still much heavier than neutrinos or photons, which are even more negligible in mass.
Is an oxygen atom have twice the mass of a sulphur atom?
No. On average a sulfur atom is twice the mass of an oxygen atom.
An atom has no mass?
It does have a mass.
Is the mass of an iron atom any different from the mass of a copper atom?
Yes, the mass of an iron atom is different from the mass of a copper atom. The mass of an iron atom is approximately 56 atomic mass units, while the mass of a copper atom is approximately 63.5 atomic mass units. Therefore, there is a difference of about 7.5 atomic mass units between the two.
Where is he mass of an atom concentrated?
99.9% of the mass of an atom is located in the nucleus
