Galileo Galilei (. [É¡aliËlÉËo É¡aliËlÉËi] ; 15 February 1564 â 8 January 1642), was an Italian astronomer, physicist, engineer, philosopher, and mathematician who played a major role in the scientific revolution during the Renaissance.É¡aliËlÉËo É¡aliËlÉËi] ; 15 February 1564 â 8 January 1642), was an Italian astronomer, physicist, engineer, philosopher, and mathematician who played a major role in the scientific revolution during the Renaissance.
Philadelphia, PA 19116 - Peer Comparisons by Rank and Percentile. The table below compares 19116 to the other 1,635 ZIP Codes in Pennsylvania by rank and percentile using July 1, 2015 data.The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.he table below compares 19116 to the other 1,635 ZIP Codes in Pennsylvania by rank and percentile using July 1, 2015 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.
Protactinium (atomic number 91) is a metal discovered by Oswald Gohring and Kasimir Fajans in 1913. It was only in 1934 when the element was first isolated. Protactinium-231 was discovered by John Cranston and Frederick Soddy and Lisa Meitner and Otto Hahn in 1918.This metal is found in uranium ores while its isotopes are present in uranium-238 and uranium-235.Protactinium is a rare metal that reacts with inorganic acids, water vapor, and oxygen.It is toxic, radioactive, and harmful for human health. Because protactinium is a rare element, it is not used for commercial purposes and only for scientific research.pent nuclear fuel is also used to extract the metal. In households, it is found in smoke detectors in the form of protactinium-233 which is the product of decay of neptunium-237. The isotope itself has a half life of only 27 days (in comparison, the half life of protactinium-231 is over 32,000 years).