1.

An isotope ._(Y)A^(X) undergoes a series of m alpha and n beta disintegrations to form a stable isotope ._(Y -10)B^(X -32). The value of m and n are respectively

Answer»

6 and 8
8 and 10
5 and 8
8 and 6

Solution :`._(Y)A^(X) RARR ._(Y - 10)B^(X - 32) + m ._(2)He^(4) + n ._(+1)e^(0)`
Value of `m = (X -(X) -32)/(4) = 8`
Value of `n = Y - Y - 10 - 2 xx 8 = 6`


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