• A. E4 to E1

• B. E4 to E3

• C. E3 to E1

• D. E2 to E1

• A.

• B.

• C.

• D.

X is a radioactive nuclide that decays to a stable nuclide. The activity of X falls to 1/16th of its original value in 32 s.

What is the half-life of X?

• A. 2 s

• B. 4 s

• C. 8 s

• D. 16 s

What is correct about the nature and range of the strong interaction between nuclear particles?

• A. It is attractive at all particle separations.

• B. It is attractive for particle separations between 0.7 fm and 3 fm.

• C. It is repulsive for particle separations greater than 3 fm.

• D. It is repulsive at all particle separations.

Which property of a nuclide does not change as a result of beta decay?

• A. Nucleon number

• B. Neutron number

• C. Proton number

• D. Charge

• A. $\frac{\left(2m_p+m_n+m\right)c^2}{3}$

• B. $\frac{\left(2m_p+m_n-m\right)c^2}{3}$

• C. $\left(2m_p+m_n+m\right)c^2$

• D. $\left(2m_p+m_n-m\right)c^2$

• A.

• B.

• C.

• D.

• A.

• B.

• C.

• D.

• A.

• B.

• C.

• D.

• A. I and II only

• B. I and III only

• C. II and III only

• D. I, II and III