Helium and hydrogen and group 3 to 12 got 2 valence electron
helium has 2 electrons (valence electrons) and has a completely filled s orbital. so it does not need any more electron to achieve stability
There are two electrons in the valence shell of helium.
2--> 1s^1, 1s^2
Helium has only two electrons with one ring (or energy level). Both the electrons are in the one and only energy level / shell / ring.
yes.they have the maximum number of electrons in their outer energy level?
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.
Electrons in the outermost principal energy level are called valence electrons.
outer energy level
Helium has only two electrons with one ring (or energy level). Both the electrons are in the one and only energy level / shell / ring.
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
All the noble gases Helium, Neon, Argon, Krypton, Xenon and Radon have a stable octet of electrons in their outer energy level.
Hydrogen and Helium both only need two valence electrons to fill their outer shell.
hydrogen, helium, lithium, and beryllium
Hydrogen, helium, alkali, alkaline metals.
No
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.
yes.they have the maximum number of electrons in their outer energy level?
Boron has 3 electrons in it's outer level.
Electrons in the outermost principal energy level are called valence electrons.
The are the valence electrons.