Scientenstences

Arrhenius, Svante -- (Swedish Chemist) p 172-3, 468, 470. K like a shotn for march with acids and bases. Defined acids and bases in scathe of their behavior when dissolved in water. Also suggested that rate constants set forth exponentially with inverse temperature, and that for molecules to react upon collision they must conk out activated, introducing the parameter Ea became known as the activation energy.

Aspdin, Joseph -- (British bricklayer), 827. patent a product 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 found on the Isle of Portland. This product is now used worldwide.

Aston, Francis W. -- (British chemist and physicist) 24. Developed technique of mass spectrometry as extension of the measurement of the charge-mass ratio of the electron. The relative canaille on the atomic scale are related to supreme mass on the gram 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 equal numbers of particles. His work explained untold of the previous work by several different chemists.



His work was rewarded by the naming of an important constant, Avogadros number, N0 = 6.022137 x 1023 Balmer, Johann Jakob -- (German chemist) 534. Discovered in 1885 that hydrogen atoms emit 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. Found in 1965 that by the impression of sunlight, the thought to be chemically inert noble gases would react...

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