[['Pa', 'DENSITY,_G/CM3', '15.37'], ['[TABLECONTEXT]', 'FORMULA', 'Pa'], ['Pa', 'SYMMETRY', 'tetragonal'], ['Pa', 'COLOR', 'silvery-gray'], ['[TABLECONTEXT]', '[TITLE]', 'Protactinium'], ['Pa', 'PEARSON_SYMBOL', 'tI2']]
Protactinium is a silvery-gray element with tetragonal symmetry, with 15.37 g/cm3 density and a Pearson symbol of tl2.