subshell
Noun
Meaning
(chemistry, physics) Atomic orbitals for which the values of the n and l quantum numbers are the same, such as the three 2p or five 3d atomic orbitals.
(computing) A child process launched by a shell.
Source: en.wiktionary.orgExamples
The high third ionisation energy for Eu and Yb correlate with the half filling 4f 7 and complete filling 4f 14 of the 4f subshell, and the stability afforded by such configurations due to exchange energy.
As well as the elements of groups 4 to 11, they add scandium and yttrium in group 3 which have a partially filled d subshell in the metallic state.
Despite the filled d subshell in metallic copper it nevertheless forms a stable ion with an incomplete d subshell.
Each block is named according to the subshell in which the "last" electron notionally resides.
Each cell represents a subshell with and given by its row and column indices, respectively.
For instance, one may speak of the subshell with and as a '2s subshell'.