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
Federated Moulders' (Metals) Union of Australia the Amalgamated Metals, Foundry and Shipwrights' Union in February 1983. Federated Moulders' (Metals) Union of Australia The Federated Moulders' (Metals) Union of Australia (FMMUA) was an Australian trade union which existed between 1899 and 1983. It represented moulders - skilled tradesmen who fabricated the moulds used to cast metal products in foundries. Despite its exclusive attitude towards membership, which kept the total number of FMMUA members low throughout its existence, the vital position of moulders in major industries such as mining, manufacturing and the railways ensured that the union remained industrially powerful, and the union had a reputation for being