Question

what is the noble gas configuration for boron? li2s22p1 he1s22s2 he2s22p1 he2s22p2 3/10

Explanation:

Boron has an atomic number of 5. The noble - gas shorthand notation uses the electron configuration of the nearest noble gas with a lower atomic number (helium in this case, which has 2 electrons). Then we add the remaining electrons in the outer shells. Helium has the configuration [He] and boron has 3 more electrons after helium, which fill the 2s and 2p orbitals as 2s²2p¹. So the noble - gas configuration for boron is [He]2s²2p¹.

Answer:

[He]2s²2p¹