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Helium and hydrogen and group 3 to 12 got 2 valence electron

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9y ago
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11y ago

helium has 2 electrons (valence electrons) and has a completely filled s orbital. so it does not need any more electron to achieve stability

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11y ago

There are two electrons in the valence shell of helium.

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13y ago

2--> 1s^1, 1s^2

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Q: How many electrons are in the outer energy level of a helium atom?
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Related questions

How many number of electrons of helium in outer ring?

Helium has only two electrons with one ring (or energy level). Both the electrons are in the one and only energy level / shell / ring.


Does an atom of helium have eight electrons in its outer energy level?

the largest number of electrons an atom of helium can have is 2, because it is in the first period, which means it can only have one energy level, which has a maximum capacity of two electrons


Which group has a stable number of electrons in their outer most energy level?

All the noble gases Helium, Neon, Argon, Krypton, Xenon and Radon have a stable octet of electrons in their outer energy level.


What two atoms will have their outer energy level filled with two electrons?

Hydrogen and Helium both only need two valence electrons to fill their outer shell.


Which atom does not need 8 electrons in it outer energy level to be stable?

hydrogen, helium, lithium, and beryllium


What element with 1-2 electrons in the outer energy level?

Hydrogen, helium, alkali, alkaline metals.


Is a noble gas such as helium tends not to form compounds with other elements its outer energy level is missing two electrons?

No


Which element has a full outer most energy level containing only two elecreons?

Elements that have full outer most energy levels containing 2 electrons would be those in group 2 of the periodic table (alkaline earths). Namely, Be, Mg, Ca, Sr, Ba, and Ra. Helium also has 2 electrons in it's outer most energy level.


Do noble gasses have the maximum number of electrons in their outer energy level?

yes.they have the maximum number of electrons in their outer energy level?


How many electrons does boron have in its outer energy level?

Boron has 3 electrons in it's outer level.


Electrons in they outer most principal energy level crossword?

Electrons in the outermost principal energy level are called valence electrons.


The electrons in the outer energy level of an atom are called?

The are the valence electrons.