Fundamentals of Chemistry 在線電子書 圖書標籤:
發表於2024-11-08
Fundamentals of Chemistry 在線電子書 pdf 下載 txt下載 epub 下載 mobi 下載 2024
Chemistry deals with the properties and transformations of materials.
Materials are samples of matter; they include a rock, the secretion from
a pituitary gland, the varnish on a table, the odorant from a flower,
cobra venom, a helium atom, and a proton. Chemists observe how ma-
terials change; they coordinate their observations into useful concepts,
and they predict conditions under which specific changes will
occur-often to produce materials never previously observed. Chem-
istry s origins are ancient. Metallurgy, leather tanning, fermentation,
and the manufacture of soap, glass, and pigments were all devised
before man acquired the concepts that now underlie his understanding
of chemical change. Advances in chemical theory and technology
during the past two centuries, however, have been spectacular com-
pared with all earlier progress. The most valuable group of ideas held
by chemists has proved to be the atomic and molecular hypotheses.
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Fundamentals of Chemistry 在線電子書 pdf 下載 txt下載 epub 下載 mobi 下載 2024