Question

how positively charged protons remains together at nucleous ​

Answer 1

The strong nuclear force pulls together protons and neutrons in the nucleus. At very small distances only, such as those inside the nucleus, this strong force overcomes the electromagnetic force, and prevents the electrical repulsion of protons from blowing the nucleus apart.

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Answer 2

Explanation:

When protons or neutrons get close enough to each other, they exchange particles (mesons), binding them together. Once they are bound, it takes considerable energy to break them apart. ... Although the strong force overcomes electrostatic repulsion, protons do repel each other.

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