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Within the atom's nucleus.

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Q: Over 99 percent of the mass of an atom is contained where?
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The mass of an atom is contained primarily in its?

The mass of an atom is contained primarily in its nucleus.


What is contained in the nucleus of a atom?

Protons and neutrons. Virtually all of the atom's mass.


How the mass of an atom is organized?

most of the mass is contained in the nucleus.the mass is spread evenly through the whole atom, and the electron cloud.


Where can the most mass be found in an atom?

Essentially all of the atom's mass is in the nucleus. In the lightest atom, that of hydrogen, it's about 99.95 percent. In the heaviest naturally occurring atom, that of Uranium238, it's about 99.979 percent.


Where is most of the mass of an atom contained?

When calculating the mass of an atom, you add the mass of the protons and the neutrons. This is the nucleus of the atom. The electrons are small enough to be ignored except in the most delicate calculations.


What is the earths atomic mass?

Since the Earth is not a single atom, nor a collection of similar atoms, it does not have an atomic mass. Atomic mass is a measure of how much matter is contained by a specific atom.


Where is most of the atoms mass found?

An atom's mass is concentrated in its nucleus, which is located in the center of the atom. Protons and neutrons within the nucleus are responsible for its mass; the electrons, which are located outside of the nucleus, don't contribute to the mass of the 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


Aproximately 99.9 percent of the mass of an atom is in the?

the nucleus (protons and neutrons)


What percent of the atom is free space empty of mass?

If the atom's outer boundary is established by the "mean radius of the outermost electron orbital" or something like that, the atom is waaaaaaaaaaay over 99% free space. The hydrogen atom has a diameter over 100,000 times the diameter of the proton in it's nucleus.


Is most of the mass contained in the nucleus of the atom?

Yes. because electrons revolve around the nucleus and have practically negligible mass when compared to the nucleus.