The stability of an isotope is determined by the number of protons and neutrons

Question

The stability of an isotope is determined by the number of protons and neutrons present in the nucleus and the resulting completion between the attractive and repulsive forces. With respect to this statement which of the following is incorrect. Larger nuclei have a tendency to be less stable. Stable nuclei with low atomic numbers (-20) have the same number of neutrons and protons. Stable nuclei with high atomic numbers (>30) have the same number of neutrons and protons. Stable nuclei high atomic numbers (> 30) have a higher number of neutrons than protons.

Explanation / Answer

Option 3(Statement 3) "Stable nuclei with high atomic numbers have the same number of neutrons and protons" is Incorrect and thats why is the answer.

As the atomic number increases, number of proton increases, this causes electrostatic repulsion between protons, making them to fall away. But adding neutrons increases the gap and thereby decreasing repulsionsand making atom stable.

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