I vote for Francium.

Regards
Matthias

On 17 Nov 2017 at 6:11, David Hillman wrote:

> Here is the Element Quiz Question:
> 
> The Question:
> This element was the last element to be first discovered in nature
> rather than by synthesis. At any given time, only one ounce of this
> element exists in the Earth's crust. This element has a interesting
> history as it was discovered in 1925, 1926, 1930 and 1936 before the
> "real" discovery was validated. The name of this element was
> influenced by the word "cat". Which element is being described?

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