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Chemistry, 21.08.2019 05:50 ofmiceandkj1

To what element does thorium-230 (atomic number-90) decay when it emits an alpha particle (42he)?
a. 22688ra
c. 22886rn
b. 23090ra
d. 22286rn

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To what element does thorium-230 (atomic number-90) decay when it emits an alpha particle (42he)?
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