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Why an electron is ignored from the calculations of the weight of an atom?
Wiki User
∙ 13y ago
The mass of a proton is about 1.67 * 10−27 kg or 1.007 atomic mass units.
Neutrons are very close to this, at 1.675 *10-27 kg, or 1.009 Atomic Mass units.
Electrons have a mass less than approximately 1/1836 of this so can effectively be ignored.
Wiki User
∙ 14y ago
Wiki User
∙ 7y agoThey disregard the mass of the electrons because they it is so very small compared to the mass of the protons and the neutrons. The mass of a proton, for example, is about 1800 times that of an electron.
Wiki User
∙ 13y agoIt can be ignored becasue of the same thing.
Wiki User
∙ 10y agoThe mass of an electron is relatively small in comparison to the mass of a proton or neutron.
Wiki User
∙ 7y agoBecause the mass of an electron is so small. It would take over 1800 electrons to equal the mass of a single proton.
Wiki User
∙ 14y agoThe mass of an electron is so small when compared to that of a proton or a neutron. This is why it is ignored when the mass number is calculated
Wiki User
∙ 13y agoBecause the Atomic Mass of an atom only includes the atoms within the nucleus, in other words the protons and neutrons.
Wiki User
∙ 6y agoThe mass of electrons is very small.
Wiki User
∙ 9y agohell i dont know
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How do scientists determine the atomic mass of an atom?
By the number of protons and neurons in a element. each has a relative atomic mass of 1. an electron weighs around a 2000th of this, so is ignored for Ar calculations
What is the smallest atom?
Hydrogen is the smallest atom by mass. Helium, neon, fluorine and oxygen are smaller in size. Many calculations put the helium as the smallest atom. But a few other calculations put neon as the smallest atom!
What is the size of an atom versus an electron?
an atom is larger than an electron
What happens when an electron is added to an atom it will acquire?
when an electron is added to an atom, the atom will acquire a negative charge.
What kind of atom tends to have one electron?
The hydrogen atom has 1 electron.
How do scientists determine the atomic mass of an atom?
By the number of protons and neurons in a element. each has a relative atomic mass of 1. an electron weighs around a 2000th of this, so is ignored for Ar calculations
What particle of an atom has very little weight?
electron
What is the smallest atom?
Hydrogen is the smallest atom by mass. Helium, neon, fluorine and oxygen are smaller in size. Many calculations put the helium as the smallest atom. But a few other calculations put neon as the smallest atom!
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.
If the electron in a hydrogen atom were the size and weight of a golf ball what would be the size and weight of the proton and neutron and what would be the orbital diameters of the electron and neutr?
If the electron were the size of a golf ball, the proton would be about the size of a basketball and the electron would be orbiting about 8000 meters away (assuming the Bohr model of the atom).
What happens when an atom loses an electron to another atom?
The atom that gains electron becomes an anion. The atom that loses electron becomes a cation.
Where is the most of an atom found?
The nucleus has most of the mass (weight) of an atom. The size of the atom, however, is related to its electron cloud (i.e. to the electrons that orbit around the nucleus)
How do elements of the periodic table interact?
Listed in order of atmoic weight. Electrons have the majority of weight in the atom (proton, neutron, electron.)
How Atoms can accept or lose electron's. If an atom loses an electron what will its resulting charge be?
Gain of an electron transform the atom in an anion.Loss of an electron transform the atom in a cation.
Why do electrons not count when you talk about the mass of the atom?
atomic mass means he weight of atom so electron is lighter than proton and neutron thats why it not count in mass of atom
Is an electron in a hydrogen atom the same as an electron in a uranium atom?
yes
What is the size of an atom versus an electron?
an atom is larger than an electron
