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The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table?<br>$${}^{63}_{29}\text{Cu} + {}^{1}_{1}\text{H} \rightarrow 6\,{}^{1}_{0}n + \alpha + 2\,{}^{1}_{1}\text{H} + X$$
Correct Answer: 8
Balancing mass numbers, $$63 + 1 = 6 + 4 + 2 + A$$, so $$A = 52$$. Balancing atomic numbers, $$29 + 1 = 0 + 2 + 2 + Z$$, so $$Z = 26$$. Element 26 is iron, which is in group 8.
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