Protacinium


 * Element Name:** Protactinium


 * Element Symbol:** Pa


 * Atomic Mass:** 231.04[[image:protactinium.png width="216" height="288" align="right"]]


 * Atomic Number:** 91


 * Protons:** 91


 * Electrons:** 91


 * Discovery:** 1918 by Kasimir Fagans, and Oswald Helmuth Gohring.


 * How it was named:** They named the element Brevium, meaning brief, and then continued with there studies.


 * State of matter:** Solid room temperature.


 * Melting point in °c:** 1568 °c.


 * Boiling point in °c:** 4027 °c.


 * Characteristics:** Has a bright metallic luster which it retains for some time in air. Also is a highly toxic and radioactive rare earth metal that requires special handling.


 * Uses:** For handling plutonium.


 * Interesting facts:** Both toxic and highly radioactive. Protactinium is present in small amounts in most natural products and materials, it is ingested with food or water and inhaled with air.

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