Consider the following radioactive decays I. U 92 ⟶ - α 90 Th and II. 90 Th ⟶ - α Ra 88 In which case group of parent and daughter elements remains unchanged.

Question

Consider the following radioactive decays I. U 92 ⟶ - α 90 Th and II. 90 Th ⟶ - α Ra 88 In which case group of parent and daughter elements remains unchanged., In ( I ), In ( II ), Both in ( I ) and ( II ), None of the above

MARKS App · Accepted Answer

For the following radioactive decays I. U 92 ⟶ - α 90 Th and II. Th 90 ⟶ - α 88 Ra In both Uranium and Thorium belongs to IIIB group. ∵ Elements with atomic number 90 to 103 belongs to same group, i.e. III - B 3 rd group (i.e. actinoids).

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