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Why are electrons not used to determine the mass number or atomic mass of atoms?
Wiki User
∙ 11y ago
because
Rick Satterfield
Wiki User
∙ 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.
Wiki User
∙ 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.
Wiki User
∙ 13y agoThe atom is the tiniest organism in the world.
Wiki User
∙ 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.
Wiki User
∙ 14y agoExplain why electrons make up much of an atom's volume but not much of its mass?
Wiki User
∙ 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
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How you can use the atoms mass number and atomic number to determine the number of protons electrons and neutrons in the atom?
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.
What does Bohrs diagram represent?
it represents where the atoms, protons, Atomic Mass, atomic number, and electrons where they are located on the nucleus.
How many electrons are all atoms trying to get?
atoms try to get 10 electrons on shells around the atom. how many shells the atom has is based on the atomic number and atomic mass the atomic number determines how many shells their are.
How can the number of proton neutron and electron be calculated to get atomic number and atomic mass?
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
What is the formula used to calculate the number of electrons when only the atomic number is given?
The number of electrons is simply the same as the atomic number, assuming the compound or element is neutral (not positive or negative). To find the number of neutrons, take the atomic mass and subtract atomic number. The number of electrons is simply the same as the atomic number, assuming the compound or element is neutral (not positive or negative). To find the number of neutrons, take the atomic mass and subtract atomic number.
How you can use the atoms mass number and atomic number to determine the number of protons electrons and neutrons in the atom?
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.
How is an atom's atomic number related to it's number of electrons?
For neutral atoms the atomic number is equal to the number of electrons.
How many atoms does electrons have?
Atoms have 1 to 118 electrons. For a neutral atom the number of electrons is equal to the number of protons (atomic number).
What element has only three more electrons than germanium?
The element that has three more electrons than a neutral germanium atom is bromine. You can determine this by the atomic number. The atomic number of an element is the number of protons in the nuclei of its atoms. In a neutral atom, this is also the number of electrons. So, the atomic number of germanium is 32, so its neutral atoms contain 32 protons and 32 electrons. Move to the right three more elements, and you get bromine with an atomic number of 35, so its neutral atoms contain 35 protons and electrons.
How many electrons that each atom have?
each of atoms have electrons that equql to atomic number of that of atoms
What does Bohrs diagram represent?
it represents where the atoms, protons, Atomic Mass, atomic number, and electrons where they are located on the nucleus.
What are the atomic number?
The atomic number of an atom is the atoms number of protons. The number of protons is same as the number of electrons.
What are protons and electrons equal to on the periodic table?
The equivalence is with the atomic number.
How many electrons are in an oxygen atom that hasan atomic number of 8?
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).
How do you determine the number of electrons?
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.
How does the number of separate electrons shown for the group 2 metal atoms compare to the number of atoms?
The number of electrons in a neutral atom is equal to the atomic number.
What does the atomic numbers stand for in atoms?
The atomic number of an atom is the number of protons or electrons present in an atom.
