Nuclear equations Knowledge-Based Practice

Questions

1. 1.

   Which balanced nuclear equation represents the positron emission ($\beta^+$ decay) of nitrogen-13?

   • A) ${}_{7}^{13}\text{N} \rightarrow {}_{8}^{13}\text{O} + {}_{+1}^{0}\text{e}$
   • B) ${}_{7}^{13}\text{N} \rightarrow {}_{6}^{13}\text{C} + {}_{+1}^{0}\text{e}$
   • C) ${}_{7}^{13}\text{N} \rightarrow {}_{8}^{13}\text{O} + {}_{-1}^{0}\text{e}$
   • D) ${}_{7}^{13}\text{N} \rightarrow {}_{6}^{13}\text{C} + {}_{-1}^{0}\text{e}$
2. 2.

   In the nuclear decay equation ${}_{84}^{210}\text{Po} \rightarrow X + {}_{2}^{4}\text{He}$, which nuclide is represented by $X$?

   • A) ${}_{82}^{208}\text{Pb}$
   • B) ${}_{86}^{214}\text{Rn}$
   • C) ${}_{82}^{206}\text{Pb}$
   • D) ${}_{80}^{206}\text{Hg}$
3. 3.

   A nucleus of uranium-235 undergoes neutron-induced fission according to the equation ${}_{92}^{235}\text{U} + {}_{0}^{1}\text{n} \rightarrow {}_{56}^{144}\text{Ba} + {}_{36}^{89}\text{Kr} + x\,{}_{0}^{1}\text{n}$. What is the value of the coefficient $x$ that balances this nuclear equation?

   • A) 2
   • B) 3
   • C) 4
   • D) 1
4. 4.

   What unknown particle $X$ balances the nuclear reaction equation ${}_{13}^{27}\text{Al} + {}_{2}^{4}\text{He} \rightarrow {}_{15}^{30}\text{P} + X$?

   • A) A proton, ${}_{1}^{1}\text{p}$
   • B) A beta particle, ${}_{-1}^{0}\text{e}$
   • C) An alpha particle, ${}_{2}^{4}\text{He}$
   • D) A neutron, ${}_{0}^{1}\text{n}$

Answers and step-by-step solutions appear after you finish the test.