91
Pa
Protactinium
Series: Actinide
Mass: 231.03588(2) g·mol−1
Discovered: 1917
Melting Point: 1596.85 C (1870 K)
Boiling Point: 4026.85 C (4300 K)
View pictures of Protactinium at the Wooden Periodic Table.
Read about Protactinium on Wikipedia.

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Copyright 2008 Mark Ivey. Based on data retrieved from Wikipedia.

Sat Sep 12 17:41:34 2015