Arrange the following species in the decreasing order of their bond dissociation energy.
`O_2 , O_(2)^(+ ) , O_(2)^(-) ,O_(2)^(2-)`

Explanation

To arrange the species \( O_2 \), \( O_2^+ \), \( O_2^- \), and \( O_2^{2-} \) in decreasing order of their bond dissociation energy, we will follow these steps:

### Step 1: Understand Bond Dissociation Energy
Bond dissociation energy is the energy required to break a bond between two atoms. It is directly related to the bond order; higher bond order means stronger bonds and thus higher bond dissociation energy.

### Step 2: Determine the Total Number of Electrons
We need to find the total number of electrons for each species:
- \( O_2 \): Each oxygen atom has 8 electrons, so \( O_2 \) has \( 8 + 8 = 16 \) electrons.
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