Question

Which statement describes what occurs as two atoms of bromine combine to become a molecule of bromine?

(1) Energy is absorbed as a bond is formed.
(2) Energy is absorbed as a bond is broken.
(3) Energy is released as a bond is formed.
(4) Energy is released as a bond is broken.

Answer 1

Br + Br -> Br2 (covalent bond)

forming of bonds releases energy, since the Br's are at a lower energy state as Br2

Answer is #3

Answer 2

The correct answer is option 3.

Step-by-step explanation:

Whenever there is a formation of bond between 2 atoms energy is released. This energy release is due to stability gained by the atoms after the formation of a bond that is why extra energy is released as a heat into surroundings. Exact process is occurring when 2 bromine atoms form bond to give molecule of bromine.

Whenever there is a dissociation of bond between 2 atoms energy is given. The energy provided externally so as to break the stable bond present between the atoms.