Question 17 (1 point] Bohr developed his model by applying Newton's second law of motion (F = ma} to an electron. The net force is described as Coulomb's law for the interaction between an electron of charge -q that is a distance r from a proton of charge +q, that force would I: be F = %. The acceleration of the electron is in circular orbit. so the acceleration 2 of the electron's orbit around the more massive proton is given by (L = 3?. This is 2 gives the equation % = % which should look familiar. Bohr also had to look at angular momentum of the orbiting electron, which is beyond physics 30, but this is where Planck's constant comes in. Using the above classical physics and quantum ideas Bohr came up with the following equation to solve for orbital radii of the electron in a hydrogen atom. b.2712 r = n 411:2 1(qu Determine the orbital radius, in m, ofan electron in the orbital, n = (3.0000x10AO) around a hydrogen atom. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: | x10 An swe r Question 18 {1 point) When iodine-135 decays into its daughter isotope, xenon-135, it has a known half- life of 6.57 hours. An initial sample of iodine-135 is measured to be 52.2 g. Determine the mass, in grams, of xenon-135 expected after 182 minutes have passed. Rouno' and record your answer to one decimal pface. Your Answer: Answer Question 21 (1 point) A decay curve for an unknown radioactive isotope is shown below: 100 90 Amount of Parent Isotope Remaining (%) 8 2 8 2 9 8 8 9 o 2 3 4 5 6 8 9 10 11 12 Time (min) Determine the half life of the unknown isotope, in seconds (s). Round your answer to the nearest whole number. Your