Pa

Pa, symbol for the element protactinium.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on Pa from Fact Monster:

  • protactinium - protactinium protactinium , radioactive chemical element; symbol Pa; at. no. 91; at. wt. 231.0359; ...
  • Pennsylvania - Information on Pennsylvania — economy, government, culture, state map and flag, major cities, points of interest, famous residents, state motto, symbols, nicknames, and other trivia.
  • Philadelphia, Pa. - Information on Philadelphia, Pa. — economy, government, culture, state map and flag, major cities, points of interest, famous residents, state motto, symbols, nicknames, and other trivia.
  • Pa-li-ch'iao - Pa-li-ch'iao: Pa-li-ch'iao: see Baliqiao, China.
  • Pa-ta-shan-jen - Pa-ta-shan-jen: Pa-ta-shan-jen: see Chu Ta.

See more Encyclopedia articles on: Compounds and Elements