What is the atomic number of francium, the element discovered by Perey?
87
89
91
93
Answer
Francium, with the atomic number 87, holds the distinction of being the last element naturally occurring on the periodic table. Its existence was confirmed by Marguerite Perey in 1939, making it the final piece in the puzzle of naturally occurring elements. This highly radioactive element, however, poses a challenge for in-depth study due to its fleeting presence and limited availability.
Magnificent Marguerite Perey: A Quiz on the Pioneering French Physicist of the 20th Century!
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