Wednesday, 2024-11-27
The daily puzzle:
What does '*****' mean in the following text?
"***** is a chemical element with the symbol Na (from Latin: natrium) and atomic number 11. It is a soft, silver-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23Na. The free metal does not occur in nature, but instead must be prepared from its compounds; it was first isolated by Humphry Davy in 1807 by the electrolysis of ***** hydroxide."--++--++--
The answer and more (#)