Question SLPaper 1AAnswerWhat is the best estimate for the diameter of a helium nucleus?A10−21m10^{-21} \mathrm{m}10−21mB10−18m10^{-18} \mathrm{m}10−18mC10−15m10^{-15} \mathrm{m}10−15mD10−10m10^{-10} \mathrm{m}10−10m
