Who first discovered Louisiana?

Who first discovered Louisiana? Robert Cavelier de La Salle Why is Louisiana called Louisiana? You may know that Louisiana was named for French King Louis XIV. The territory was named in his honor by French explorer La Salle, who claimed the territory to the west of the Mississippi River in the 1680s for France. When […]

What isotopes are used in smoke alarms?

What isotopes are used in smoke alarms? Am-241, with a half-life of 432 years, was the first americium isotope to be isolated, and is the one used today in most domestic smoke detectors. Am-241 decays by emitting alpha particles and gamma radiation to become neptunium-237. Is americium-241 a radioisotope? Americium-241 (241Am, Am-241) is an isotope […]

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