Question

What are the value of $a$ and $b$ respectively in the reaction ${}_9^{4}Be+{}_2^{4}He\to {}_b^{a}X+{}_0^{1}n$

• A. $17,7$
• B. $7,11$
• C. $12,6$
• D. $6,12$

Answer 1

The correct option is B $7,11$

${}_9^{4}Be{+}_2^{4}He{⟶}_b^{a}X{+}_0^{1}n$

or, ${}_9^{4}Be{+}_2^{4}He{⟶}_{11}^{7}X{+}_0^{1}n$

$a=7$

$b=11$.