Question Card 10
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Question Card 10
cost: 2 neutron points![Scale 2](https://phylogame.org/wp-content/themes/phylo/img/num/2.png)
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4 NEUTRON POINTS
What element did William Crookes discover while observing green line in spectrum of selenium?
Graphic by Eric Hamber Secondary
4 NEUTRON POINTS
What element did William Crookes discover while observing green line in spectrum of selenium?