In the following equation for the alpha decay of bismuth-214, supply the missing element that correctly completes the equation.

Question

nvidiaintely · Answer

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Au (gold)
		
Tl (thallium)
		
At (astatine)
		
Fr (francium)

nvidiaintely · Answer

@Kevin @sweetburger @AAbomosalam1998 @aaronq @TheSmartOne @welshfella @calculusxy @Vuriffy

kevin · Answer

At (astatine)

nvidiaintely · Answer

Okay, and you @welshfella?

welshfella · Answer

an alpha particle contains 2 protons so the atomic number will decrease by 2  to 81.
What element has an atomic number of 81?  Chech the periodic table.  iTS NOT ASTATINE.

nvidiaintely · Answer

Tl (thallium)

nvidiaintely · Answer

Thanks welshfella!

welshfella · Answer

yes thallium is correct

kevin · Answer

@welshfella But if it's thalium, the mass number should be increase 10?

welshfella · Answer

No the mass number will be 4 less :- 210

kevin · Answer

Owhh... Maybe I'm sleepy. lol
Thx