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∙ 11y agobecause
Rick Satterfield
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∙ 11y agoThe mass of electrons is very small (around 1820 times smaller) and is negligible when compared to the mass of protons or neutrons. Hence the mass of electrons are not used to determine mass number or Atomic Mass.
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∙ 11y agoFirstly lets look at the volume. Electrons "orbit" the central nucleus of the atom. The apparent volume of an atom is determined by this electron cloud. The size of the atomic nucleus is relatively speaking very small. For the hydrogen atom for example the atomic cloud is 145,000 times the diameter of the nucleus.
Secondly lets look at the masses.
The nucleus is made up of protons and neutrons that are essentially the same mass, actually neutrons are very slightly heavier. Whereas in comparison the electron is only 0.00054 of the mass of a neutron.
If you take Carbon-12 with 6 protons and 6 neutrons and only 6 electrons contribution of the electron to the overall atomic mass is very small.
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∙ 13y agoThe atom is the tiniest organism in the world.
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∙ 15y agoThey're pretty much insignificant. A proton has 1,837 times the mass of an electron. Ignoring the electron's mass just doesn't make much difference.
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∙ 14y agoExplain why electrons make up much of an atom's volume but not much of its mass?
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∙ 13y agoBecause electrons weigh so little that its not worth counting them.
Wiki User
∙ 13y agoYes, although very very tiny.
The mass of an electron is 9.11*10^-31 kg
The volume of an electron is believed to be (I cannot find a solid certain source) 9.4*10^-44 m^3
The numbers of protons and of electrons in an atom are both the same as the atomic number, and the difference between the mass number and the atomic number is the number of neutrons in the atom.
it represents where the atoms, protons, Atomic Mass, atomic number, and electrons where they are located on the nucleus.
atomic number is the amount of protons, equal to the atomic number, the electrons, minus the mass number atomic number is the amount of protons, equal to the atomic number, the electrons, minus the mass number atomic number is the amount of protons, equal to the atomic number, the electrons, minus the mass number
The atomic number on the periodic table determines the number of electrons in the atoms of the elements. Each element has a unique atomic number, which corresponds to the number of protons in the nucleus and thus the number of electrons surrounding the nucleus in a neutral atom.
Neutral atoms of neon have the same number of electrons as atoms of fluorine, magnesium, and sodium, excluding helium atoms.
The numbers of protons and of electrons in an atom are both the same as the atomic number, and the difference between the mass number and the atomic number is the number of neutrons in the atom.
You can determine the number of electrons in an element by looking at its atomic number on the periodic table. The atomic number represents the number of protons in the nucleus of an atom, and since atoms are neutral, this also corresponds to the number of electrons.
For neutral atoms the atomic number is equal to the number of electrons.
Atoms have 1 to 118 electrons. For a neutral atom the number of electrons is equal to the number of protons (atomic number).
it represents where the atoms, protons, Atomic Mass, atomic number, and electrons where they are located on the nucleus.
each of atoms have electrons that equql to atomic number of that of atoms
The number and arrangement of electrons in the atom's electron cloud determine its chemical properties. Electrons are involved in chemical reactions as they interact with other atoms. The number of protons in the atom's nucleus also plays a role in determining its chemical properties by defining its atomic number and identity.
The atomic number of an atom is the atoms number of protons. The number of protons is same as the number of electrons.
The equivalence is with the atomic number.
The atomic number of an element _is_ the number of electrons in one of its atoms. Indeed, a sample of an element can be defined as any combination of atoms with the same atomic number. Oxygen is the element with atomic number 8. It is the element whose atoms have 8 electrons in their neutral state (and 8 protons).
The number of electrons is equal to the number of protons in that atom. An easy way to view that is with the Bohr Model.
The atomic number of an atom is the number of protons or electrons present in an atom.