consider the nuclear equation below.\nx→89228ac + -10β\nwhat is the nuclide symbol of x?\n90230th\n89229ac\n9…

Explanation:

Step1: Apply mass - number conservation

In a nuclear reaction, the sum of mass - numbers on the left - hand side equals the sum of mass - numbers on the right - hand side. The mass - number of $^{228}{89}Ac$ is 228 and the mass - number of $^{\ \ 0}{-1}\beta$ is 0. Let the mass - number of $X$ be $A$. Then $A=228 + 0=228$.

Step2: Apply atomic - number conservation

The sum of atomic numbers on the left - hand side equals the sum of atomic numbers on the right - hand side. The atomic number of $^{228}{89}Ac$ is 89 and the atomic number of $^{\ \ 0}{-1}\beta$ is - 1. Let the atomic number of $X$ be $Z$. Then $Z=89+( - 1)=90$.

Step3: Identify the element

The element with atomic number $Z = 90$ is thorium (Th).

Answer:

$^{228}_{90}Th$