A) 4
B) 8
C) 6
D) 9
Correct Answer: D
Solution :
\[_{4}B{{e}^{9}}{{+}_{2}}H{{e}^{4}}{{\xrightarrow[{}]{{}}}_{6}}{{C}^{12}}{{+}_{0}}{{n}^{1}}\] Hence, the mass number of Be atom is 9.You need to login to perform this action.
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