Answer: The correct option is 2.
Explanation: We are given in the question that Fluorine molecule is dissociating into two Fluorine atoms. Equation for the following is given by:
[tex]F_2+energy\rightarrow F+F[/tex]
In a chemical reaction if the energy is written at the reactant side, the energy is being absorbed and if the energy is written at the product side, the energy is being released.
From the given chemical equation, the energy is written at the reactant side, so the energy is being absorbed by the reactants in order to break the bond between [tex]F_2[/tex] molecule to form 2 individual Fluorine atoms.
Hence, the correct option is 2.
