Actinium Aluminium Americium Antimony Argon Arsenic Astatine Barium Berkelium Beryllium Bismuth Bohrium Boron Bromine Caesium Calcium Californium Carbon Cerium Chlorine Chromium Cobalt Copper Curium Darmstadtium Dubnium Dysprosium Einsteinium Erbium Europium Fermium Fluorine Francium Gadolinium Gallium Germanium Gold Hafnium Hassium Helium Holmium hydrogen Indium Iodine Iridium Iron Krypton Lanthanum Lawrencium Lead Lithium Lutetium Magnesium Manganese Meitnerium Mendelevium Mercury Molybdenum Neodymium Neon Neptunium Nickel Niobium Nitrogen Nobelium Osmium Oxygen Palladium Phosphorus Platinum Plutonium Polonium Potassium Praseodymium Promethium Protactinium Radium Radon Rhenium Rhodium Roentgenium Rubidium Ruthenium Rutherfordium Samarium Scandium Seaborgium Selenium Silicon Silver Sodium Strontium Sulfur Tantalum Technetium Tellurium Terbium Thallium Thorium Thulium Tin Titanium Tungsten Ununbium Ununhexium Ununoctium Ununpentium Ununquadium Ununseptium Ununtrium Uranium Vanadium Xenon Ytterbium Yttrium Zinc Zirconium

Description: Protactinium

Element Specifications:
Element Name: Protactinium
Element Symbol: 91
Element Number: 91
Element Mass: 231.04000
Element Boiling Point: 1.00 °C
Element Melting Point: 1600.00 °C
Element Proton Count: 91
Element Electron Count: 91
Element Neutron Count: 140
Element Density (g/cm³): 15.40000
Element Color (estimate): Unknown

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