Subscribe to our newsletter. This is a guide to help you choose the best gasoline for your auto, with quick 'what you need to know' facts. There is information about octane ratings, additives, reformulated and leaded fuel, and links to sites offering complementary or comprehensive information. Seaborg takes the reader through his life, from his beginnings in a Michigan company town, to Berkeley and research on transuranium elements and university administration, to Chicago and the Manhattan Project, to Washington and nuclear policy, and to a host of places in between.
Qualitative analysis is used to identify the chemical species in an unknown substance.
Introductory qualitative chemical analysis exploits the unique characteristics of the elements to separate metal ions in an aqueous solution. This article identifies the main metal groups, discusses characteristics of major reagents, and lists some cation complexes formed with NH 3 and OH - . The primary methylxanthine in chocolate is theobromine, a molecule similar to caffeine. See the structure of theobromine and read about its chemistry, effects on people and animals, and uses. There are links to chocolate history and chemical research, veterinary advice for theobromine poisoning, and related resources.