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For clue 5 on your mission, you are asked to visit the LARGEST of the Alkali Metals. Identify the name of this element and give its the group number, period number, symbol and atomic mass for the most rare element in this family. Tell me what its "magical power" is that makes it very rare. (hint: It is larger than Cesium)

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The largest of the alkali metals is francium. Here are the details you requested:

  • Element Name: Francium
  • Group Number: 1
  • Period Number: 7
  • Symbol: Fr
  • Atomic Mass: Approximately 223 u (atomic mass is not very well defined due to its radioactivity)

Magical Power: Francium is extremely rare because it is highly radioactive and has a very short half-life, with its most stable isotope (francium-223) having a half-life of only about 22 minutes. This makes it difficult to find in nature, as it decays rapidly and is produced in trace amounts through the decay of actinium. Its scarcity is what imparts its "magical" nature, as it is one of the least encountered elements in the universe.