Based on experimental evidence

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Problem

Based on experimental evidence, the bond length of a carbon-carbon single bond is 154 pm154\ \text{pm} (1 pm=10−12 m1\ \text{pm}=10^{-12}\ \text{m}) and the radius of a carbon nucleus is 2.7×10−15 m2.7\times10^{-15}\ \text{m}. If modelling kits were made to scale, how long would the plastic stick representing a single bond need to be if the carbon nucleus was represented as a plastic ball with a 0.5 cm0.5\ \text{cm} radius?

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