Atomic Number 91 (+ facts: Sources, Uses, Color and more...) 2022

All atoms have an atomic number. But what is the chemical element that has 91 as atomic number?

The answer is Protactinium and there is so much cool stuff about Protactinium that people don't know that I would keep reading if I were you.

Alright now to the facts!

Protactinium Overview

Atomic Number

91

Learn more about the atomic number.

Description

Very rare, silvery-white, extremely radioactive metal.

Atomic Symbol

Pa (Protactinium)

Discovery

Discovered By: Fredrich Soddy, John Cranston, Otto Hahn, Lise Meitner

Year: 1917

Location: England/France

State at 20 °C

solid

Sources

Does not occur in nature. Found among fission products of uranium, thorium, and plutonium.

Uses

It has no significant commercial applications.

Atomic Mass

231,03588

Learn more about the atomic mass.

Name Origin

Greek: proto and actinium (parent of actinium); it forms actinium when it radioactively decays.

Want to learn more details and data? Check my Elements Comprehensive List.

Colored Periodic Table

Need an editable periodic table to edit? Maybe add your school logo, work team or anything else to maker your paper look cool?

Along with basic atom / element information (like Protactinium-(91) atomic number and all the other atomic data), it also comes with color coded info about: State (Gas, Liquid or Solid at room temperature), Groups/series details and much more...

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Download and enjoy this complete and colored periodic table for you to edit and enjoy. It's in an editable excel format or .ods (open).
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