1.

\[_{Z}{{X}^{M}}{{+}_{2}}H{{e}^{4}}{{\to }_{15}}{{P}^{30}}{{+}_{0}}{{n}^{1}}\]. Then          [KCET 2002]

A.                 \[Z=12,\,\,M=27\]          
B.                 \[Z=13,\,\,M=27\]
C.                 \[Z=12,\,\,M=17\]          
D.                 \[Z=13,\,\,M=28\]
Answer» C.                 \[Z=12,\,\,M=17\]          


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