There are 2 electrons in the 1s orbital so the configuration is 1s2.
How many atoms / electron clouds does helium have ?
When a helium atom loses an electron, it forms a helium ion which is positively charged because it has one less electron than protons. This helium ion is written as He+.
When helium loses an electron, it becomes a positively charged helium ion (He+).
The electron configuration of helium is 1s2; two electrons on the first (and the single) electron shell.
Helium has no electron affinity.
Electron configuration of helium: 1s2
Helium has two valence electrons.
Helium has two electrons, and each electron occupies an orbital. Therefore, in a helium atom, there are two orbitals, one for each electron.
two
If one electron has been removed from Helium's electron shell then it is a He+ ion. If both of its electrons have been removed it becomes a He2+ ion. Either way they are both positive ions.
Lithium ion (Li+) and beryllium ion (Be2+) have the same electron configuration as helium because they both have filled electron shells.
Helium is not an electron donor or acceptor as it has a full outer electron shell (2 electrons). It is classified as a noble gas and is chemically inert, meaning it does not readily form chemical bonds.