For grp 15,16,&17- 3rd period elements will have higest bond energy in their respective grp.i.e P-P in 15, S-S in 16 & Cl-Cl in 17.

Introduction:
Bond energy refers to the amount of energy required to break a chemical bond. It is a measure of the strength of a bond. In general, the higher the bond energy, the stronger the bond. In this case, we need to determine which of the given bonds has the highest bond energy among S-S, O-O, Se-Se, and Te-Te.

Explanation:

Bond Energies:
Bond energy is influenced by several factors, including bond length, bond order, and electronegativity. Generally, as the bond length decreases and the bond order increases, the bond energy increases. Additionally, the presence of multiple bonds or higher atomic masses can also contribute to higher bond energies.

Sulfur-Sulfur (S-S) Bond:
The bond energy of an S-S bond is relatively low. Sulfur is a larger atom, and the bond length is relatively long. Additionally, the electronegativity difference between sulfur atoms is not substantial. Therefore, the bond energy of S-S is relatively low compared to the other options.

Oxygen-Oxygen (O-O) Bond:
The bond energy of an O-O bond is higher than that of an S-S bond. Oxygen is a smaller atom compared to sulfur, resulting in a shorter bond length. Additionally, oxygen is more electronegative than sulfur, leading to a greater electron density towards the oxygen atom. This increased electron density contributes to a stronger bond, resulting in a higher bond energy.

Selenium-Selenium (Se-Se) Bond:
The bond energy of a Se-Se bond is higher than that of an O-O bond. Selenium is larger than oxygen, resulting in a longer bond length. However, selenium has a higher atomic mass than oxygen, which contributes to a stronger bond. The increased atomic mass enhances the bond energy.

Tellurium-Tellurium (Te-Te) Bond:
The bond energy of a Te-Te bond is the highest among the given options. Tellurium is larger and heavier than both selenium and oxygen. The bond length is longer, and the bond energy is further increased due to the higher atomic mass of tellurium. The combination of a longer bond length and higher atomic mass contributes to the highest bond energy among the given options.

Conclusion:
Among the given options, the Te-Te bond has the highest bond energy. The factors influencing bond energy, such as bond length, atomic mass, and electronegativity, contribute to the observed trend.