1. The reaction: 14/7 C --> 0/-1 e + 14/7 N is an example of a (blank) emission.
Alpha particle emission Beta particle emission electron capture positron emission None of these

2. The half-life of a certain radioactive element is 67.0 hours. How much would be left after 335.0 h if the original sample was 1.000 mg?
0.031 mg 0.310 mg 0.062 mg 0.016 mg None of these

3. Fill in the blank: 22/11 Na--> (blank) +22/10 Ne
4/2 He 1/0 n 0/-1 e 0/1 e None of these

4. If nuclide X has a change in its mass number, then it must have undergone:
Alpha particle emission Beta particle emission electron capture positron emission None of these

5. When 237/93 Np produces an alpha particle, what is the other product?
243/95 Americium 245/95 Americium 237/91 Protactinium 233/91 Protactinium None of these

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