【单选题】The principal quantum number of the first d subshell is __________.
【简答题】以下不符合区域变电所的选址要求的是( )。
【单选题】At maximum, an f-subshell can hold __________ electrons, a d-subshell can hold __________ electrons, and a p-subshell can hold __________ electrons.
【单选题】Which quantum number defines a subshell?
【判断题】Each subshell of quantum number l contains (2 l +1) orbitals.
【单选题】The 2p subshell contains ( )