Promethium?

Graham N

On 11 Jun 2010, at 17:14, David D. Hillman wrote:

> Hi folks - ok, Bev pointed out that I was not fulfilling my duty and had 
> not posted a Friday Element Quiz - here ya go:
> 
> The Question
> This element is naturally occurring and was first discovered in 1902. The 
> chemical behavior of this element is nearly identical to the element La. 
> This element is a weak beta emitter. Producing this element is very 
> challenging and one of the easier production methods is to produce it 
> synthetically by neutron bombardment of Ra isotopes in fission reactors. 
> Who am I?
> 
> Good Luck - this should be a difficult element to identify.
> 
> Dave Hillman
> Rockwell Collins
> [log in to unmask]
> 
> 
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