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A Noble Gas does not need to have eight electrons to be classed as such - it simply must have a full outer shell. The first shell can only hold two electrons, which is what helium has, so helium is a Noble Gas. The second and third shells hold eight electrons, which is why other noble gases can be seen as having eight electrons. However no Noble Gases have eight electrons in total - just eight in the outer shell, as the shells fill from the inside out...
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoHelium is an exception to the rest of the noble gases because it has only two electrons in it's valence shell, unlike the rest which all have 8.
Wiki User
∙ 13y agoIn the first shell - 1s - 2 electrons is also an extremely stable arrangement.
Wiki User
∙ 13y agoUnlike the other shells there is only room for 2 electrons in the first and smallest electron shell.
Wiki User
∙ 13y agoit's two two two and two
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What is the least reactive element?
The noble gases: Helium, neon, etc.
What are the gasses in the periodic table that are unreactive?
The noble gases are extremely stable and have an octet (eight electrons in their outer shell with the exception of helium that has two). The far right group on the periodic table contains the noble gases such as helium, neon, argon, krypton, etc.
Why the helium is not included in noble gases group?
Helium is include in the group 18 along with the noble gases.
What is the rectivity of the noble gases in terms of valence electrons?
Noble gases are also known as the inert gases, meaning they don't react because they have a stable octet (eight electrons in their valence shell). They all have eight electrons in their valence shell with the exception of helium because helium is rebel, but they are all nonreactive including helium.
How many valence electrons do noble gases have?
Inert gases have 8 valence electrons. This is why they are inert, they have a complete octet formed of electrons and are in their lowest energy configuration.
Why helium being a noble gas forms an ion?
All noble gases can be ionised- helium is no exception- it is not easy- it can be done in plasmas, glow discharge tubes.
What is the least reactive element?
The noble gases: Helium, neon, etc.
What are the gasses in the periodic table that are unreactive?
The noble gases are extremely stable and have an octet (eight electrons in their outer shell with the exception of helium that has two). The far right group on the periodic table contains the noble gases such as helium, neon, argon, krypton, etc.
Why the helium is not included in noble gases group?
Helium is include in the group 18 along with the noble gases.
What are the other noble gases that are like helium?
HELIUM,NEON,ARGON,KRYPTON,XENON and RADON are the noble gases
What is the rectivity of the noble gases in terms of valence electrons?
Noble gases are also known as the inert gases, meaning they don't react because they have a stable octet (eight electrons in their valence shell). They all have eight electrons in their valence shell with the exception of helium because helium is rebel, but they are all nonreactive including helium.
Are helium and xenon and neon noble gases?
Yes, they are all noble gases.
How many valence electrons do noble gases have?
Inert gases have 8 valence electrons. This is why they are inert, they have a complete octet formed of electrons and are in their lowest energy configuration.
What is the group name in which helium is found?
Helium is a Noble Gas in Group O.
What are the nonmetals in nobel gases?
There are no metals in noble gases.All are gases in noble gases.
All noble gases except helium have this?
Helium has 2 valence electrons. All other noble gases have 8 valence electrons.
What is the group name for helium?
Noble Gases
