ChemistryEasy113×since 2002Q2125The radius of the 2nd\mathrm{2^{nd}}2nd orbit of Li2+\mathrm{Li^{2+}}Li2+ is xxx. The expected radius of the 3rd\mathrm{3^{rd}}3rd orbit of Be3+\mathrm{Be^{3+}}Be3+ isA1627x\frac{16}{27}x2716xB49x\frac{4}{9}x94xC94x\frac{9}{4}x49xD2716x\frac{27}{16}x1627xCheck answerSkip