Nuclear Chemistry - Result Question 13
####13. Statement I 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 $45^{\circ}$ slope as the atomic number is increased.
Statement II Proton-proton electrostatic repulsions begin to overcome attractive forces involving protons and neutrons and neutrons in heavier nuclides.
(2008)
(a) 236 and 92
(b) 234 and 90
(c) 238 and 90
(d) 236 and 90
Show Answer
Answer:
Correct Answer: 13. (b, d)
Solution:
- After atomic number 20 , proton-proton repulsion increases immensely, more neutrons are required to shield this electrostatic repulsion, curve of stability incline towards neutron axis.
