Go-astronomy logo

Elements

Protactinium - Pa

The element Protactinium, atomic number 91, is formed from nucelar decay, which results from .

      1. Name:
      2. Protactinium
      1. Symbol:
      2. Pa
      1. Atomic number (protons):
      2. 91
      1. How created:
      2. nucelar decay
      1. Period (row):
      2. 7
      1. Atomic weight:
      2. 231.035880000
      1. Melting point:
      2. 1841 K
      1. Boiling point:
      2. 4300 K
      1. Density:
      2. 15.3700000 g/cm3

    Find your inner astronomer. Your complete guide to amateur astronomy.