Multiple choice problems in Radioactive Decay.

1. An alpha (α) particle is essentially a ___________ nucleus.
A.carbon-12
B.uranium
C.hydrogen
D.plutonium
E.helium

2. Which of the following statements is true?
i.Some naturally occurring isotopes are radioactive
ii.All naturally occurring isotopes are radioactive
iii.No naturally occurring isotopes are radioactive
iv.All radioactive elements are man-made
v.none of the above

3. for most common types of radioactive decay, the order of least penetrating to most penetrating to human tissue is:
A.beta, gamma, alpha
B.alpha, beta, gamma
C.gamma, alpha, beta
D.gamma, beta, alpha
E.alpha, gamma, beta

4. Gamma (g) rays are:
1.are very low energy, very short wavelength electromagnetic radiation
2.are very high energy, very short wavelength electromagnetic radiation
3.are very high energy, very long wavelength electromagnetic radiation
4.are very low energy, very long wavelength electromagnetic radiation
5.none of the above

5. An electron emitted from the nucleus during some kinds of radioactive decay is known as:
A.A positron
B.A beta (β) particle
C.A gamma ray
D. An alpha (α) particle
E. nuclear fusion