The Periodic Table/91 - Protactinium (Pa)

Element Protactinium (Pa, 91)

Here you can read more about the chemical element Protactinium. Its shemical symbol is Pa and its atomic number is 91. The relative atomic mass of Protactinium is 231.03588 u. The elemental classification of Protactinium is Actinides, and it belongs to group 3 and period 7 in the Periodic Table of Elements.

The density of Protactinium is 15370 kg/m3. The melting point of Protactinium is 2113 Kelvin (1840 ℃). The boiling point of Protactinium is 4300 Kelvin (4027 ℃). Protactinium was discovered in the year 1900 by William Crookes.

To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Protactinium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.

Data about element Protactinium

Chemical symbol
Element classification
Atomic number
Relativ atomic mass
Atomic mass
231.03588 u
15370 kg/m3
Melting point
2113 K   (1840 ℃)
Boiling point
4300 K   (4027 ℃)
Discovered year
Discovered by
William Crookes