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The ""(92)^(238) U disintegrates to give...

The `""_(92)^(238) U` disintegrates to give `4 alpha` and `6 beta`- particles . The atomic number of daughter element obtained is 10 x. x is ___

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The correct Answer is:
9
`""_(92) U^(238) to ""_(Z) X^(A) + 4 (""_(2) He^(4)) + 6 (""_(-1) beta^(0)) , 238 = 16 + A + 0 implies A = 238 - 16 = 222`
`92 = 8-6 + Z , 92 = 2 + Z implies Z = 90`
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