Accept the embarrassment, 16 letters
English chemist and physicist who discovered palladium and rhodium and demonstrated that static and current electricity are the same (1766-1828), 9 letters
A silicate of calcium, 12 letters
A white or grayish mineral typically found in metamorphic limestone, 12 letters
English writer and early feminist who denied male supremacy and advocated equal education for women, 14 letters
Mother of Mary Shelley (1759-1797), 14 letters