A) 4, 1
B) 3, 7
C) 8, 1
D) 4, 7
Correct Answer: A
Solution :
\[_{90}T{{h}^{228}}{{\xrightarrow{{}}}_{83}}B{{i}^{212}}+x_{2}^{4}\alpha +y_{-1}^{0}\beta \] \[228=212+4x\] or \[4x=16\] or \[x=4\] \[90=83+2x-y=83+8-y\] or \[y=1\]You need to login to perform this action.
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