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QJEEAdv08Ch2510: JEE Advanced 2008 Chemistry - Class 11 JEEAdv08Ch2510 Solution: STATEMENT - 1 : The plot of atomic number (y-axis) versus…
STATEMENT - 1 : The plot of atomic number (y-axis) versus number of neutrons (x-axis) for stable nuclei shows a curvature towards x-axis from the line of 45o slope as the atomic number is increased.
STATEMENT - 2 : Proton-proton electrostatic repulsions begin to overcome attractive forces involving protons and neutrons in heavier nuclides
STATEMENT - 2 : Proton-proton electrostatic repulsions begin to overcome attractive forces involving protons and neutrons in heavier nuclides
Multiple Choice Options
- A Statement - 1 is True, Statement - 2 is True; Statement - 2 is a correct explanation for Statement - 1
- B Statement - 1 is True, Statement - 2 is True; Statement - 2 is NOT a correct explanation for Statement - 1
- C Statement - 1 is true, Statement - 2 is False
- D Statement - 1 is False, Statement - 2 is True
Step-by-Step Verified Solution
With increase in the atomic number, the proton-proton electrostatic repulsion begins to overcome attractive forces involving proton and neutrons in heavier nuclides. The stability relationship can be represented by a line with a slope of 45 , i.e., the maximum stability is attained when N = Z. Right of the curve a radioactive nuclide would be neutron rich and would decay by -emission to produce a daughter nucleus with a lower n/p ratio. For heavier nuclides, p-p repulsions start to offset the attractive forces and an excess of neutrons over protons, is required for stability.
