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Band of Stability

Q. Stable and radioactive isotopes as a function of numbers of neutrons and protons in a nucleus. The stable nuclei (dark blue dots) define a region known as the belt of stability. Estimate the optimal number of neutrons for a nucleus containing 70 protons.

Solved • May 1, 2020

Band of Stability

Q. Which of the following radioactive nuclei is most likely to decay via emission of a β- particle? a) iodine-131 b) magnesium-23 c) nitrogen-13 d) rubidium-83 e) neptunium-237

Solved • May 1, 2020

Band of Stability

Q. What mode of decay is probable for 41-Ar? a) electron capture b) alpha emission c) positron emission d) beta emission

Solved • May 1, 2020

Band of Stability

Q. One of the nuclides in each of the following pairs is radioactive. Predict which is radioactive and which is stable. 39-K and 40-K, a) 39-K is radioactive, 40-K is stable b) 40-K is radioactive, 39-K is stable

Solved • May 1, 2020

Band of Stability

Q. One of the nuclides in each of the following pairs is radioactive. Predict which is radioactive and which is stable. nickel-58 and nickel-65. a) nickel-58 is radioactive, nickel-65 is stable b) nickel-65 is radioactive, nickel-58 is stable

Solved • May 1, 2020

Band of Stability

Q. One of the nuclides in each of the following pairs is radioactive. Predict which is radioactive and which is stable. 209-Bi and 208-Bi, a) 209-Bi is radioactive, 208-Bi is stable b) 208-Bi is radioactive, 209-Bi is stable

Solved • May 1, 2020

Band of Stability

Q. Using general tendencies and the chart given in the introduction, predict the most likely mode of decay of each of the following radioactive isotopes. Drag the appropriate items to their respective bins. magnesium-30, nitrogen-13, thorium-232, platinum183, bromine-90

Solved • Apr 6, 2020