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3) Fill the missing and decide the type of decay in the following decays: 60 60 a) Co* → []+ 29 Co b) ¹50 → [ ] + [ ] + ¹5N 40 c) 19K + []→ 18Ar d) 84 210 PO → 2a + [ ] e) ¹3 Be → ¹2Be + [ ]

3) Fill the missing and decide the type of decay in the following decays: 60 60 a) Co* → []+ 29 Co b) ¹50 → [ ] + [ ] + ¹5N 40 c) 19K + []→ 18Ar d) 84 210 PO → 2a + [ ] e) ¹3 Be → ¹2Be + [ ]

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please solve question 3

1) If the activity of a purely radioactive sample of 55Fe is measured to be 0.5 mCi. What is the number of nuclei of this isotope present after 5.4 years. 2) 226Ra (t₁/2 = 1600 y) alpha decays to the 1st excited state of nucleus X with branching ratio 6% and alpha decays to the ground state of X with branching ratio 94%. Calculate the partial half-life for the first mode transition (the one to the first excited state of X). 3) Fill the missing and decide the type of decay in the following decays: a) Co* → [ ] + Co b) ¹50 [ ] + [ ] + ¹5N 40 c) 10K + [ ] 18Ar d) 21 Po 84 e) ¹3 Be →>> 2a + [ ] ¹2Be + [ ]
Transcribed Image Text:1) If the activity of a purely radioactive sample of 55Fe is measured to be 0.5 mCi. What is the number of nuclei of this isotope present after 5.4 years. 2) 226Ra (t₁/2 = 1600 y) alpha decays to the 1st excited state of nucleus X with branching ratio 6% and alpha decays to the ground state of X with branching ratio 94%. Calculate the partial half-life for the first mode transition (the one to the first excited state of X). 3) Fill the missing and decide the type of decay in the following decays: a) Co* → [ ] + Co b) ¹50 [ ] + [ ] + ¹5N 40 c) 10K + [ ] 18Ar d) 21 Po 84 e) ¹3 Be →>> 2a + [ ] ¹2Be + [ ]
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