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Sagot :
(4) Energy is released and a bond is broken. This happens because when the bromine molecule splits, the energy that was holding the two atoms together is released.
Answer is: (2) Energy is absorbed and a bond is broken.
This energy is called bond-dissociation energy.
Bond-dissociation energy is the measure of bond strength in a chemical bond.
Bond energy of bromine molecule (sigma bond) is energy needed for breaking up one molecule of bromine into two bromine atoms.
When two bromine atoms (Br) form molecule of bromine (Br₂), than energy is released and bond is formed.
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