Consider the lead isotope 207 Pb, Part A How many electrons, protons, and neutrons are in a neutral 207 Pb atom? Enter your answers numerically separated by commas. N.. Np. N, = 82,82,125 Submit Previous Answers v Correct Part B The lead nucleus has a diameter of 14.2 fm. What is the electric field strength at the surface of a lead nucleus? Express your answer with the appropriate units. kg E = 2.305 • 1017 m' Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining

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Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.