Classes of metals Classes of metals Class A metals are metals that form hard acids. Hard acids are acids with relatively ionic bonds. These metals, such as iron, aluminium, titanium, sodium, calcium and the lanthanides, would rather bond with fluorine than iodine. They form stable products with hard bases, which are bases with ionic bonds. They target molecules such as phospholipids, nucleic acids and ATP. Class B metals are metals that form soft acids. Soft acids are acids with relatively covalent bonds. These metals, such as lead, gold, palladium, platinum, mercury and rhodium, would rather bond with iodine than fluorine. They form stable
The Unbeheaded King Xylar and Othomae. As usual, the political constraints under which the protagonist labor are at least as important as the fantastic element. The decidedly unromantic, even hardscrabble circumstances under which he must achieve his goals leaven the fantasy with a strong sense of reality, and highlight de Camp's unusual reversal of the genre's stereotypical rags to riches theme. The Unbeheaded King The Unbeheaded King is a fantasy novel by American writer L. Sprague de Camp, the fourth book of his Novarian series and the third in the "Reluctant King" trilogy featuring King Jorian of Xylar. It was first published as