232. Emission of β-particles during radioactive decay of a substance is from
233. The atomic number of a radioactive element is not changed, when it emits __________ rays.
234. Indian monazite sand contains __________ percent thorium.
235. Thorium can be converted into U-233 in a __________ reactor.
236. Specific gravity of uranium and plutonium is about
237. Which of the following isotopes is not present in natural uranium?
238. Percentage of the heavy water in ordi water is around
