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The electron has the least mass of the three mentioned. That's why the valance electrons are the determining factor in most reactions. The proton closely follows the neutron because they are exactly the same except for charge. This leaves the the electron as the lightest sub-atomic particle.

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βˆ™ 13y ago
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βˆ™ 5mo ago

The electron is the smallest of these entities, being a subatomic particle with a mass much smaller than that of a neutron or an ion. Neutrons and ions are composed of multiple subatomic particles and have greater mass compared to electrons.

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βˆ™ 14y ago

Since quarks form these other items they must be smaller.

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βˆ™ 14y ago

Electron is the lightest and neutron is the heaviest

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βˆ™ 13y ago

An electron is smallest by far. A proton and neutron have close to the same mass, around 1830 times as much as the mass of an electron.

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βˆ™ 10y ago

Of those choices (atom, neutron, electron, or ion), the electron is the smallest.

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βˆ™ 11y ago

electron has the smallest mass

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Q: What is smallest atom neutron electron or ion?
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Related questions

Which is smallest in size an ion electron neutron or atom?

electron is the smallest


A hydrogen atom that does not contain a neutron hydrogen ions can can be thought of as?

A hydrogen atom that does not contain a neutron is called a hydrogen ion or a proton. This ion is represented by the symbol H+. It consists of a single proton and an electron.


How does sodium atom form an ion?

When a sodium atom forms an ion, it loses one electron from its outer shell. This loss of an electron leaves the sodium atom with a positive charge, as it now has one more proton than electrons. This results in the formation of a sodium ion, specifically a sodium cation with a charge of +1.


Which has a linear size or radius closest to the radius of a neutron star?

Br is the atom with the smallest. K+ is the ion with the smallest radius. In general, the shape with the smallest radius has the smallest diameter


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A neutron has no charge, so a charged atom (ion) cannot attract a neutron.


An atom that gains an electron gains what type of ion?

an atom that gains an electron becomes a negative ion, called an anion.


How does a hydrogen ion change into an atom?

A hydrogen ion can change into an atom by gaining an electron. When a hydrogen ion, which is essentially a hydrogen atom that has lost its electron, gains an electron back, it will become a neutral hydrogen atom.


What is formed when an atom gains or loses an electron?

An atom forms an ion when it gains or loses an electron. If an atom gains an electron, it becomes a negatively charged ion (anion). If an atom loses an electron, it becomes a positively charged ion (cation).


When an atom loses an electron it loses a?

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What subatomic particles are closest in mass proton and neutron neutron and electron proton and electron electron and ion?

Mg+2 and Br-1