Protactinium(V) oxide
Encyclopedia
Protactinium oxide is a chemical compound with the formula Pa
2O
5. When it is reduced with hydrogen
, it forms PaO2
.
Protactinium
Protactinium is a chemical element with the symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical compounds where protactinium is usually present in the oxidation state +5, but can also assume...
2O
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...
5. When it is reduced with hydrogen
Hydrogen
Hydrogen is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of , hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. Stars in the main sequence are mainly...
, it forms PaO2
Protactinium(IV) oxide
Protactinium oxide is a chemical compound with the formula PaO2. The black oxide is formed by reducing Pa2O5 with hydrogen....
.