Not by itself, no (that is, hydrogen is not a noble gas). A neutral hydrogen atom starts out with 1 electron, but it needs 2 electrons to fill its shell. Therefore, a hydrogen atom will often form 1 covalent bond with another atom, in order to gain that 1 extra electron it needs to fill its shell.
Important note: Most elements need 8 electrons to get a full shell, but hydrogen is the exception: it only needs 2 electrons to get a full shell.
No, it doesn't have a complete octet. Phosphorous is in group 5A, meaning it has 5 valence electrons (5 electrons on its outest shell).
Helium does not form compounds because it is a noble gas with a full outer electron shell, making it very stable and unreactive. Its outer shell is already filled with electrons, so it does not need to gain, lose, or share electrons with other atoms to achieve stability.
Sodium has one electron in its outer shell, so it tends to lose that electron to achieve a full outer shell. This makes sodium more stable as it follows the octet rule by having a complete outer electron shell with eight electrons.
Group 0 Elements ( Helium, Neon, Argon...) do not form compounds because they have a complete Octet and are thus unreactive and exist as mono atomic elements
Helium is an extremely non-reactive chemical element. of course because is has nothing to react to/with. Other noble gases are helium, neon, argon, krypton, xenon, and radon. They comprise the far left column of the periodic table.
No bond at all, He has a complete outer shell
The outer shell of helium does not have an atomic number, that number belongs to helium itself whose atomic number is 2.
No, helium has 2 electrons in its outer shell, while magnesium has 2 electrons in its outer shell. So, they do not have the same amount of electrons in their outer shell.
2 valence electrons for helium (helium has only 1 shell)
2 valence electrons for helium (helium has only 1 shell)
All the Noble/Inert gasses. However, Helium (He) has a complete outer shell of only TWO(2) electrons. The other noble gases all have a complete octet (outer) shall, of EIGHT(8) (Octet) electrons.
helium is noble gas has atomic number is 2. it don't react with any other element because outer most shell is complete.
Helium is a noble gas with a full outer electron shell, making it stable and unreactive. Its electron configuration is already stable, so it has little tendency to gain, lose, or share electrons with other elements to form chemical bonds. This inertness is why helium does not readily react with other elements.
Helium is the only noble gas that does not have eight electrons in its outer shell. It has only two electrons in its outer shell.
Helium is the element in the noble geses family that does not have an octet. Helium is the element in the noble geses family that does not have an octet.
Its outer electron shell is complete, with 2 electrons. Therefore it does not readily bond with other elements.
Helium (He) and Calcium (Ca) both have 2 valence electrons.