Crookes observed the first an isotope of protactinium but neglected this.
Fajans and Gohring discovered another isotope and confirmed protactinium as new element.
Protactinium
A scientist and explorer can DISCOVER but a scientist can DISCOVER and INVENT
Protactinium is paramagnetic.
Protactinium is not corrosive.
Nothing is made from protactinium.
yes, protactinium is a metal
Protactinium is a highly reactive metal and it can react with water, particularly in its radioactive forms. This reaction can release hydrogen gas and produce protactinium hydroxide. However, protactinium is rare and not often encountered in everyday situations.
The scientist who discover it
me
by using there hands
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Protactinium is a natural chemical element; but protactinium can be obtained artificially by nuclear reactions from 232Th.