1.

In the sequence of following nuclear reactions \[_{92}{{X}^{238}}\xrightarrow{-\alpha }Y\xrightarrow{-\beta }Z\xrightarrow{-\beta }L{{\xrightarrow{-n\alpha }}_{84}}{{M}^{218}}\]                 The value of \[n\] will be                                              [MP PMT 1999]

A.                 3             
B.                 4
C.                 5             
D.                 6
Answer» C.                 5             


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