21 given the balanced equation representing a reaction: o2 --> o + o
what occurs during this reaction?
(1) energy is absorbed as bonds are broken.
(2) energy is absorbed as bonds are formed.
(3) energy is released as bonds are broken.
(4) energy is released as bonds arc formed.

(1) Energy is absorbed as bonds are broken is the correct answer.

Energy is absorbed, providing O2 with energy to break the bonds.

Hope this helps~

Atomicity occurs to prevent updates of the database occurring only partially, which can cause greater problems than rejecting the whole series outright.some are monatomic, diatomic, triatomic etc because it shows the number of atoms. for example, monatomic means it contains only one atom.