This section lists some binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and some other compounds of protactinium. For each compound, a formal oxidation number for protactinium is given, but the usefulness of this number is limited forp-block elements in particular. Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.

In compounds of protactinium (where known), the most common oxidation numbers of protactinium are:5.

Hydrides

The term hydride is used to indicate compounds of the type M_xH_y and not necessarily to indicate that any compounds listed behave as hydrides chemically.

• none listed

Fluorides

• Protactinium tetrafluoride: PaF₄
• Protactinium pentafluoride: PaF₅

Chlorides

• Protactinium tetrachloride: PaCl₄
• Protactinium pentachloride: PaCl₅

Bromides

• Protactinium pentabromide: PaBr₅

Iodides

• Protactinium triiodide: PaI₃
• Protactinium tetraiodide: PaI₄
• Protactinium pentaiodide: PaI₅

Oxides

• Protactinium oxide: PaO
• Protactinium dioxide: PaO₂
• Diprotactinium pentoxide: Pa₂O₅

Sulfides

• none listed

Selenides

• none listed

Tellurides

• none listed

Nitrides

• none listed

Carbonyls

• none listed

Complexes

• none listed