In 1994 it was proposed (and eventually accepted) that element 106 be named seaborgium, \(\mathrm{Sg}\), in honor of Glenn \(\mathrm{T}\). Seaborg, discoverer of the transuranium elements. a. \({ }^{263} \mathrm{Sg}\) was produced by the bombardment of \({ }^{249} \mathrm{Cf}\) with a beam of \({ }^{18} \mathrm{O}\) nuclei. Complete and balance an equation for this reaction. b. \({ }^{263} \mathrm{Sg}\) decays by \(\alpha\) emission. What is the other product resulting from the \(\alpha\) decay of \({ }^{263} \mathrm{Sg}\) ?

Short Answer

Expert verified
The short answer for part (a) is: \({ }^{249}\mathrm{Cf} + { }^{18}\mathrm{O} \rightarrow { }^{263}\mathrm{Sg} + 4{ }^{1}\mathrm{n}\) For part (b), the short answer is: \({ }^{263}\mathrm{Sg} \rightarrow { }^{4}\mathrm{He} + { }^{259}\mathrm{Rf}\)

Step by step solution

01

Identify the Reactants and Products for Part (a)

For part (a), it is given that \({ }^{263} \mathrm{Sg}\) is produced by bombarding \({ }^{249}\mathrm{Cf}\) with a beam of \({ }^{18}\mathrm{O}\) nuclei. So the reactants are \({ }^{249}\mathrm{Cf}\) and \({ }^{18}\mathrm{O}\), and the product is \({ }^{263}\mathrm{Sg}\). Now we need to balance the equation and find any other product(s).
02

Balance the Nuclear Reaction for Part (a)

To balance a nuclear reaction, we need to ensure that the total mass numbers and atomic numbers of the reactants are equal to the sum of the mass numbers and atomic numbers of the products. For this reaction, we have the following equation: \({ }^{249}\mathrm{Cf} + { }^{18}\mathrm{O} \rightarrow { }^{263}\mathrm{Sg} + X\) We need to determine the mass number and atomic number of X. To balance the mass numbers, we have: \(249 + 18 = 263 + A_X\), where \(A_X\) is the mass number of X. Solving for \(A_X\), we get: \(A_X = (249 + 18) - 263 = 4\), Now, let's balance the atomic numbers. The atomic numbers of Cf, O, and Sg are 98, 8, and 106, respectively. Therefore, we have: \(98 + 8 = 106 + Z_X\), where \(Z_X\) is the atomic number of X. Solving for \(Z_X\), we get: \(Z_X = (98 + 8) - 106 = 0\), So, the unknown particle X is a neutron with a mass number of 4. Thus, the balanced nuclear equation is: \({ }^{249}\mathrm{Cf} + { }^{18}\mathrm{O} \rightarrow { }^{263}\mathrm{Sg} + 4{ }^{1}\mathrm{n}\)
03

Identify the Alpha Decay for Part (b)

For part (b), we're given that \({ }^{263} \mathrm{Sg}\) decays via alpha emission, and we need to find the other product resulting from this decay. An alpha particle has a mass number of 4 and an atomic number of 2, and is represented as \({ }^{4}\mathrm{He}\). The decay is represented by the following equation: \({ }^{263}\mathrm{Sg} \rightarrow { }^{4}\mathrm{He} + Y\) Again, we need to balance the mass numbers and atomic numbers. To balance the mass numbers, we have: \(263 = 4 + A_Y\), where \(A_Y\) is the mass number of Y. Solving for \(A_Y\), we get: \(A_Y = 263 - 4 = 259\) Now, let's balance the atomic numbers: \(106 = 2 + Z_Y\), where \(Z_Y\) is the atomic number of Y. Solving for \(Z_Y\), we get: \(Z_Y = 106 - 2 = 104\) As a result, the other product Y is \({ }^{259}\mathrm{Rf}\), since Rf (Rutherfordium) has an atomic number of 104. The alpha decay equation for \({ }^{263}\mathrm{Sg}\) is: \({ }^{263}\mathrm{Sg} \rightarrow { }^{4}\mathrm{He} + { }^{259}\mathrm{Rf}\)

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Most popular questions from this chapter

Write balanced equations for each of the processes described below. a. Chromium-51, which targets the spleen and is used as a tracer in studies of red blood cells, decays by electron capture. b. Iodine-131, used to treat hyperactive thyroid glands, decays by producing a \(\beta\) particle. c. Phosphorus-32, which accumulates in the liver, decays by \(\beta\) -particle production.

Fresh rainwater or surface water contains enough tritium \(\left({ }_{1}^{3} \mathrm{H}\right)\) to show \(5.5\) decay events per minute per \(100 . \mathrm{g}\) water. Tritium has a half-life of \(12.3\) years. You are asked to check a vintage wine that is claimed to have been produced in \(1946 .\) How many decay events per minute should you expect to observe in \(100 . \mathrm{g}\) of that wine?

The mass ratios of \({ }^{40} \mathrm{Ar}\) to \({ }^{40} \mathrm{~K}\) also can be used to date geologic materials. Potassium-40 decays by two processes: \({ }_{19}^{40} \mathrm{~K}+{ }_{-1}^{0} \mathrm{e} \longrightarrow{ }_{18}^{40} \mathrm{Ar}(10.7 \%) \quad t_{1 / 2}=1.27 \times 10^{9}\) years \({ }_{19}^{40} \mathrm{~K} \longrightarrow{ }_{20}^{40} \mathrm{Ca}+{ }_{-1}^{0} \mathrm{e}(89.3 \%)\) a. Why are \({ }^{40} \mathrm{Ar} /{ }^{40} \mathrm{~K}\) ratios used to date materials rather than \({ }^{40} \mathrm{Ca} /{ }^{40} \mathrm{~K}\) ratios? b. What assumptions must be made using this technique? c. A sedimentary rock has an \({ }^{40} \mathrm{Ar} /{ }^{40} \mathrm{~K}\) ratio of \(0.95\). Calculate the age of the rock. d. How will the measured age of a rock compare to the actual age if some \({ }^{40} \mathrm{Ar}\) escaped from the sample?

Estimate the temperature needed to achieve the fusion of deuterium to make an \(\alpha\) particle. The energy required can be estimated from Coulomb's law [use the form \(E=9.0 \times 10^{9}\) \(\left(Q_{1} Q_{2} / r\right)\), using \(Q=1.6 \times 10^{-19} \mathrm{C}\) for a proton, and \(r=2 \times\) \(10^{-15} \mathrm{~m}\) for the helium nucleus; the unit for the proportionality constant in Coloumb's law is \(\left.\mathrm{J} \cdot \mathrm{m} / \mathrm{C}^{2}\right]\).

The binding energy per nucleon for magnesium- 27 is \(1.326\) \(\times 10^{-12} \mathrm{~J} /\) nucleon. Calculate the atomic mass of \({ }^{27} \mathrm{Mg} .\)

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