Q.

If atomic mass of Th is 232.18 and its atomic no. is 90. If it looses 6 - α and 4 - β particles, the mass no. of finally stable element is:

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a

212

b

208

c

226

d

208.18

answer is A.

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Detailed Solution

90Th232→82Pb208+62He4+4−1e0
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