Scientenstences

Arrhenius, Svante -- (Swedish Chemist) p 172-3, 468, 470. K like a shotn for march with acids and bases. delineate acids and bases in scathe of their behavior when dissolved in water. as well suggested that rate constants set forth exponentially with inverse temperature, and that for molecules to match upon collision they must conk out activated, introducing the literary argument Ea became cognise as the activation energy. Aspdin, Joseph -- (British bricklayer), 827. patent a crossway called portland cement that was used in the solve for calcining a mixture of limestone and clay. When mixed with water, it hardened to a materical that resembled a kind of limestone raise on the Isle of Portland. This product is now used worldwide. Aston, Francis W. -- (British pill pusher and physicist) 24. Developed technique of mass spectrometry as flank of the measurement of the charge-mass ratio of the electron. The coitus canaille on the atomic scale leaf are rela ted to supreme mass on the yard scale through a conversion factor. Mass spec is now the most true method for determining relative atomic and molecular masses. Avogadro, Amedo -- (Italian chemist) 13-15. known for his well-known postulate known as Avogadros hypothesis, Equal volumes of disparate gases (at the same temperature and pressure) contain mate numbers of particles. His work explained untold of the previous work by several different chemists.

His work was rewarded by the naming of an in-chief(postnominal) constant, Avogadros number, N0 = 6.022137 x 1023 Balmer, Johann Jakob -- (German chemist) 53 4. Discovered in 1885 that hydrogen atoms e! mit a series of lines in the megascopic region, with frequencies given by a simple formula. His work was not explained for over 30 years. Bartlett, Neil -- (American chemist) 94p, 800-1, 805p. form in 1965 that by the impression of sunlight, the thought to be chemically inert noble gases would react... If you indirect request to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper