Question

115 47 ag → ? + 0 - 1 β what element is the ? not listed cd - 115 pd - 115 ag - 115

Explanation:

Step1: Balance the atomic number

In a nuclear reaction, the sum of atomic numbers on both sides must be equal. The atomic number of \(Ag\) (\(_{47}^{115}Ag\)) is \(47\), and for \(\beta\) particle (\(_{-1}^{0}\beta\)) it is \(- 1\). Let the atomic number of the unknown element be \(Z\). Then \(47=Z+( - 1)\), so \(Z = 48\).

Step2: Balance the mass number

The mass number of \(Ag\) is \(115\), and for \(\beta\) particle it is \(0\). Let the mass number of the unknown element be \(A\). Then \(115=A + 0\), so \(A=115\).

Step3: Identify the element

The element with atomic number \(Z = 48\) is \(Cd\) (Cadmium).

Answer:

\(_{48}^{115}Cd\) (or \(Cd - 115\))