Explain the formation of H2 molecule on the basis of valance bond theo

1.	Explain the formation of H2 molecule on the basis of valance bond theory
Answer» When hydrogen atoms combine to form molecules of hydrogen, 433 KJ/mol energy is released.Whenever atoms combine to form a molecule ,there is always decrease in the energy. Actually, when two H atoms are far separated, they do not have any force of interaction (attractive or repulsive). As they tend to come closer, two different forces operates:(a) The nucleus of one H is attracted towards the electrons of the other H atoms & Vice versa. The energy is released in attraction.(b) The nuclei of the atoms as well as their electrons repel each other. Energy is needed to overcome the force of repulsion.\xa0

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