If the ratio of the mass numbers of two nuclei is 27:125, then the ratio of their surface areas is
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For nuclei, remember these proportionality relationships with the mass number A:
- Radius \(R \propto A^{1/3}\)
- Surface Area \(S \propto R^2 \propto (A^{1/3})^2 \propto A^{2/3}\)
- Volume \(V \propto R^3 \propto (A^{1/3})^3 \propto A\)