catalyst
(Encyclopedia) catalyst, substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the reaction rate by use of a catalyst is called catalysis...
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Montana
(Encyclopedia)
CE5
Montana mŏntănˈə [key], Rocky Mt. state in the NW United States. It is bounded by North Dakota and South Dakota (E), Wyoming (S), Idaho (W), and the Canadian provinces of British Columbia, ...
Elements (table)
(Encyclopedia) Elements
1 Parentheses indicate most stable isotope; brackets enclose lower and upper bounds of weight variation.
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