Artificial elements have been prepared by bombardment reactions in high energy accelerators. What is the mass number of the element X produced in the
Artificial elements have been prepared by bombardment reactions in high energy accelerators. What is the mass number of the element X produced in the following nuclear reaction `._(95)^(249)Cf + ._(7)^(15)N rarr ._(105)X + 4 ._(0)^(1)n`
A. 261
B. 264
C. 260
D. 257
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