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Please do equations 4a,4b,4c and 5a, 5b.

4. Balance each of the following nuclear equations: 234 63 29 5. Calculate cach of the following involving half-lives: a. The half-life of Na-24 is 15 h.If the initial activity of the sodium-24 is 6.4 mCi, what is its activity after 60. h. b. If a sample of I-123 with an activity of 4 kBq decays to an activity of 1 kBq in 26.4 h, what is its half-life?
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Th> e + X 4 a) Skeleton equation: 9% Sum of the atomic numbers on both si des of the equation should be equal 90 Z+(1) Thus, the atomic number of the new niclide is 91 According to the periodic table, el ement with the atomic number 91 is protactinium (Pa Sum of the mass numbers on both sides of the equation shoul d be equal 234-A+0 A 234 Thus, the mass number of the new nicli de is 234 Therefore, the missing nucli de is 9l Pa Balanced equation: 90 Th > e + 91 Pa 234 234 234 b) The unbalanced nuclear equation : 20Fr- X + :He Sum of the atomic numbers on both si des of the equati on should be equal Thus, the atomic number of the new niclide is 85 According to the periodic table, el ement with the atomic number 85 is astatine (At) Sum of the mass numbers on both sides of the equation should be equal 227 - A+4 A 227 Thus, the mass number of the new ni cli de is 223 Therefore, the daughter nucli de produced is g^ At Balanced equation: *4Fr He + At c) Skeleton equation: Cu + sto + Sum of the atomic numbers on both si des of the equation should be equal 29 +Z-29+1 Thus, the atomic number of the new niclide is 1 According to the periodic table, el ement with the atomic number 1 is hydrogen (H) Sum of the mass numbers on both sides of the equation shoul d be equal 63+ A- 64 +1 Thus, the mass number of the new nicli de is 2. Therefore, the missing nuclide is ỈH Balanced equation: Cu + H> ^Cu + IH

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Please do equations 4a,4b,4c and 5a, 5b. 4. Balance each of the following nuclear equations: 234...
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