Question

Assertion: Generally heavy nuclei are unstable. Reason : It has more neutrons and protons.

Answer 1

In unstable nuclei the strong nuclearforces do not generate enough binding energy to hold the nucleus together permanently. It is unstable nuclei that are radioactive and are referred to as radioactive nuclei and in the case of their isotopes called radioisotopes

Stable atoms have low energy states. All nuclei are composed of two basic particles, neutrons and protons.Neutrons and protons are almost the same size but differ in their electrical charge. Neutrons have no electrical charge and contribute only mass to thenucleus.

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