Question

Bond formation occurs when the energy of the system

• A. decreases
• B. increases
• C. remains same

Answer 1

The correct option is A

decreases

Decreases

Explanation of the correct answer

• When any two atoms approach each other, new force of attraction and repulsion are formed.
• The force of attraction is between nucleus of one atom and electrons of the other.
• The repulsive force is between two nuclei as well as electrons of the two atoms.
• The net result is attraction or repulsion. If the net result is attraction, the total energy of the system decreases and a chemical bond results.
• If the net result is repulsion, the total energy of the system increases and no chemical bonding takes place.

Conclusion

The bond formation takes place only when the energy of the system decreases.