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.
They 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.
It can be ignored becasue of the same thing.
The mass of an electron is relatively small in comparison to the mass of a proton or neutron.
Because the mass of an electron is so small. It would take over 1800 electrons to equal the mass of a single proton.
The 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
Because the Atomic Mass of an atom only includes the atoms within the nucleus, in other words the protons and neutrons.
The mass of electrons is very small.
hell i dont know
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
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!
an atom is larger than an electron
when an electron is added to an atom, the atom will acquire a negative charge.
The hydrogen atom has 1 electron.
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
electron
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!
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 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).
The atom that gains electron becomes an anion. The atom that loses electron becomes a cation.
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)
Listed in order of atmoic weight. Electrons have the majority of weight in the atom (proton, neutron, electron.)
Gain of an electron transform the atom in an anion.Loss of an electron transform the atom in a cation.
atomic mass means he weight of atom so electron is lighter than proton and neutron thats why it not count in mass of atom
yes
an atom is larger than an electron