Assertion : Protons carrying positive charges are compactly residing inside the nucleus.
Reason : Electrostatic repulsive force between protons is very weak.

Assertion: If electrons in an atom were stationary, then they would fall into the nucleus. Reason: Electrostatic force of attraction acts between negatively charged electrons and positive nucleus.

Assertion: If electrons in an atom were stationary, then they would fall into the nucleus. Reason: Electrostatic force of attraction acts between negatively charged electrons and positive nucleus.

All protons in an atom remain packed in a small nucleius inspite of the electrostatic repulsive force among them.Why?

Assertion (A) : Neutrons have no charge but protons are positively charged, hence net result is repulsion in them in the nucleus of an atom. In the presence of this repulsion the nucleus is highly stable. Reason (R) : The pair of nucleous (neutrons and protons) continuously exchanges the charge through mesons which may either be positively or negatively charged.