Ca-41 decays by electron capture. The product of this reaction undergoes alpha d
ID: 531437 • Letter: C
Question
Ca-41 decays by electron capture. The product of this reaction undergoes alpha decay. What is the product of this second decay reaction? a. Ti b. Ca c. Ar d. Cl e. Sc Select the nuclide that completes the following nuclear reaction. _49^115 In rightarrow _1^0 beta + ? A) _49^114 In B) _50^115 Sn C) _48^115 Cd D) _50^116 Sn E) _50^114 Sn Carbon-11 I used in medical imaging. The half-life of this radioisotope is 20.4 min. What percentage of the sample remains after 60.0 min? a. 71.2 b. 5.28 c. 13.0 d. 34.0 e. 2.94Explanation / Answer
33)
initially,
Atomic number of Ca is 20
mass number of Ca is 41
In electron capture , atomic number decreases by 1
In alpha decay, atomic number decreases by 2 and mass number by 4
so,
net decrease in atomic number = 3
net decrease in mass number = 4
After reaction,
product will have atomic number of 20-3 = 17
mass number = 41-4 = 37
Atomic number of 17 is for Chlorine (Cl)
Answer: d
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