To balance the nuclear equation \( ^{104}{47} \text{Ag} \rightarrow ^{0}{-1} \text{e} + X \), you need to find the particle \( X \).
In this decay process, silver-104 (Ag) undergoes beta decay, where an electron (beta particle) is emitted. The decayed nucleus will typically be a different element or isotope.
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Start by noting the mass numbers and atomic numbers:
- The mass number of Ag (104) is on the left.
- The atomic number of Ag (47) is also on the left.
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The emitted beta particle \( ^{0}_{-1} \text{e} \) has:
- A mass number of 0.
- An atomic number of -1.
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To find \( X \), we can set up the following equations:
- Mass number: \( 104 = 0 + \text{mass number of } X \)
- Atomic number: \( 47 = -1 + \text{atomic number of } X \)
From the mass number equation: \[ \text{mass number of } X = 104 - 0 = 104 \]
From the atomic number equation: \[ \text{atomic number of } X = 47 + 1 = 48 \]
- The resulting nucleus with mass number 104 and atomic number 48 is \( ^{104}_{48} \text{Cd} \) (cadmium).
Thus, the balanced nuclear equation is: \[ ^{104}{47} \text{Ag} \rightarrow ^{0}{-1} \text{e} + ^{104}_{48} \text{Cd} \]