1.

The number of alpha- and beta- particles emitted during the transformation of ""_(90)^(232) Th to ""_(82)^(208) Pb is respectively

Answer»

2,2
4,2
6,4
8,6

Solution :`""_(90) Th^(232) to ""_(82) Pb^(208) + a (""_(2) He^(4)) + b (""_(-1) BETA^(0)) , a = ((232- 208)/(4)) = 6 ALPHA`
` 8 = (2 XX 6) -b, b = 12 - 8 beta`


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