The symbol e is a symbol used for an a proton b

17. The symbol e is a symbol used for a(n)
A) proton.
B) neutron.
C) gamma ray.
D) beta particle.
E) alpha particle.
18. The symbol e is a symbol used for a(n)
19. Which of the following types of radiation has the highest energy?
20. For Sr, there are
21 The nuclear reaction shown below is an example of what type of process?
Th → Rn +
____
A) fusion
B) fission
C) translation
D) alpha decay

E) betadecay
22. One symptom of mild radiation sickness is
23. Why is it important that radioisotopes used in diagnostic tests have short half-lives? 24. Krypton-79 has a half-life of 35 hours. How many half-lives have passed after 105 hours 25. The half-life of bromine-74 is 25 min. How much of a 4.0 mg sample is still active after 75
min?
A) 0.50 mg
B) 1.0 mg
C) 2.0 mg
D) 0.25 mg
E) 4.0 mg