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Protons and neutrons, the particles that make up atomic nuclei, are the ones responsible for almost all of the mass of an atom. As the electron has less than 1/1800th the mass of a proton, a whole flock of electrons won't significantly change the mass of an atom. We look to the protons and neutrons (called nucleons when they are being considered as components of an atomic nucleus) to contribute to the mass of an atom, and they will be considered when we derive the atom weight of an element.
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∙ 14y ago
Matthew Jimenez
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∙ 13y agoThe protons and neutrons contribute to the mass of an atom, the electrons make an extremely small percentage of the overall mass.
So when you want to find the Atomic Mass of an atom you just have to add the atomic number (# of protons) to the number of neutrons in that particular atom.
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∙ 14y agoProtons and, neutrons compose an atom's total mass.
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∙ 13y agoOnly mass of a proton and neutron is counted towards the mass of an atom.
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∙ 12y agoThe protons and neutrons contribute most of the mass of an atom. Electrons have very little mass, but they do contribute slightly to the mass of an atom.
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∙ 11y agoneutrons and protons. add those numbers together
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∙ 14y agoThe Number of neutrons and protons.
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In Bohr's model which particles make up the most mass of the atom?
the electron particles make up the mostr mass
Which two particles make up most of the mass of a hydrogen-2 atom?
The proton and the neutron make up most of the mass of a hydrogen-2 atom.
Which particle has the least mass and where is this particle located in the atom?
The smallest particles that have been discovered and that don't only exist in theory are the quarks. They are what make up protons, neutrons, all kinds of baryons, and a few other categories of particles. But there is a theory of smaller particles that make up quarks, electrons, and other particles that were previously believed to be fundamental (But, again, these particles only exist in theory). These particles are to be called "rishons" if discovered.
Which two particles make up the mass of an atom?
. . . the two with (appreciable) mass: protons and neutrons.The atomic mass number of an element is determined by mass of the nucleus of an atom. Therefore the particles that make up the nucleus determine the mass number. These particles are protons and neutrons.The mass of the protons and neutrons do not vary between elements, but the number of each in the nucleus varies between elements and between isotopes of the same element.Protons and neutrons.idk dont asqq meehThe sum of the numbers of protons and neutrons determine the mass number. Electrons have negligible mass compared to protons and neutrons.The particles counted are neutrons and protons each having a relative atomic mass of 1. The atomic number is the number of protons.Atomic mass of an atom is the mass of the nucleus.Hence the atomic mass is the sum of the number of protons an neutrons present in the nucleus of the atom. The electrons are not considered as their mass is negligible compared to the mass of the neutrons and protons.
What particles make up most of the mass of an atom.What makes up mot of te volume of an atom?
An electron weighs about 1/1836 of a proton, so as far as an atom is concerned, all the mass is in the nucleus, with the protons and neutrons. But the electrons are rotating in their orbits a long way (in proton size terms) from the nucleus. So most of the volume of an atom is empty space.
In Bohr's model which particles make up the most mass of the atom?
the electron particles make up the mostr mass
What particles make up most of the mass atom?
air,mater
What particles take up most of the mass of an atom?
Protons and neutrons make up most of the mass of an atom. Electrons weigh almost nothing by comparison.
Which two particles make up most of the mass of a C-12 atom?
proton and neutron
Which two subatomic particles make up the atomic weight of an atom of an element?
The protons and the neutrons make up the atomic weight of an atom of an element, they have roughly the same mass and electrons have so little mass that they're negligible.
Which subatomic particles makes up most of the mass off the atom?
The major contribution to the mass of an atom is from protons and neutrons; electrons have a known but negligible mass.
What particles in the nucleus of the atom?
The particles in the nucleus of an atom are the protonsand the neutrons. We call particles that make up the atomic nucleus nucleons, and this word is just a way to say "the particles that make up an atom's nucleus" in an abbreviated manner.
Which two particles make up most of the mass of a hydrogen-2 atom?
The proton and the neutron make up most of the mass of a hydrogen-2 atom.
What particles make up the atomic mass number of an element?
The atomic mass number of an element is determined by mass of the nucleus of an atom. Therefore the particles that make up the nucleus determine the mass number. These particles are protons and neutrons.The mass of the protons and neutrons do not vary between elements, but the number of each in the nucleus varies between elements and between isotopes of the same element.
What sub atomic particles makes up mass of an atom?
Protons and neutrons
What are the 2 particles that make up the nucleus of an atom?
Protons and neutrons compose the nucleus of an atom. Most of the mass of an atom exists in the nucleus. Other smaller sub atomic particles such as quarks exist, but are usually not addressed until advanced physics or chemistry classes.
What are the particles that make up an atom?
Here are some particles that make up an atom: Protons-Positive charge particles Electrons-negative charged particles Neutrons- no charge at all :))
