Promethium

Chemical reactions
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Reaction of promethium with acids


Promethium dissolves readily in dilute sulphuric acid, forming a pink solution of Pm(III) ions and hydrogen gas, H2:

2 Pm(s) + 3 H2SO4(aq) 2 Pm3+(aq) + 3 SO42−(aq) + 3 H2(g)