Which of the following statements is correct?
- AThe rate of radioactive decay cannot be controlled,but that of nuclear fission can be controlled.
- BNuclear forces are short-range,attractive,and charge-dependent.
- CNuclei of atoms having the same number of neutrons are known as isobars.
- DWavelength of matter waves is given by the de Broglie formula,but that of photons is not given by the same formula.
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$_{88}^{223} Ra \rightarrow _{82}^{209} Pb + _{6}^{14} C$
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$_{88}^{223} Ra \rightarrow _{86}^{219} Rn + _{2}^{4} He$
Calculate the $Q$-values for these decays and determine that both are energetically allowed.
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