1.
In recent years there
has been concern about _______________.
2.
Define radioactivity.
3.
Radio active materials
have _________________
4.
What do the radioactive
nuclei emit or release?
5.
What happens after the
changes in the nucleus?
6.
Transformation of an
element in to a different isotope or formation of an entirely different element
is called _________________
7.
Define isotope.
8.
Define nuclear
radiation.
9.
How many types of
nuclear radiation are there? What are they?
10. The symbol of Alpha particles is _______ , Beta
particle is _______, Gamma particle is ____
and that of neutron is ________.
11. Which of the radiation has no mass?
12. The interaction of nuclear radiation with matter
depends on _____________.
13. Name a naturally occurring radioactive element.
14. What does Uranium-238 emit when it undergoes nuclear
decay?
15. Who named the Alpha rays?
16. Define alpha particle.
17. Why Alpha particles can not pass through matter?
18. What happens when Alpha particles pass through matter?
19. Define Beta particle.
20. Name the nuclear radiation that travels farther
through matter?
21. Beta particles are _________________________ .
22. Neutrons decay to form ___________________ and
______________.
23. Beta particles are stopped by _______________ or
_______________ .
24. What is the similarity between alpha and beta
particles.
25. When do beta particles lose energy.
26. Who isolated radium and when?
27. Define gamma ray.
28. How does gamma ray differ from Alpha and Beta
particles?
29. Gamma rays can go through up to _____________ or
________________.
30. Why is gamma ray a greater danger to health?
31. Define “Neutron emission”?
32. What is required to stop most fast neutrons?