During the formation of a chemical bond - (1) energy decreases (2) energy increases (3) energy of the system does not change (4) electron-electron repulsion becomes more than the nucleus-electron attraction

During the formation of a chemical bond - (1) energy decreases (2) energy increases (3) energy of the system does not change (4) electron-electron repulsion becomes more than the nucleus-electron attraction
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(1) energy decreases
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