Question

Among chalcogens, the correct order of amount of energy released in electron gain
(electron gain enthalpy) is :
(1) S>> Se > Te
(2) O<S<Se< Te
(3) Te<Se>S>O
(4) O<Te<Se<S​

Answer 1

Answer:

Te<s<Se<te

I m not sure sorry

Answer 2

Among chalcogens, the correct order of amount of energy released in electron gain  (electron gain enthalpy) is: O<Te<Se<S​ (Option 4)

• The value of electron gain enthalpy generally decreases down the group because the size of atoms increases.
• But Oxygen has the least value of electron gain enthalpy in the group because it is very compact in structure and strong interelectronic repulsion exists.
• Sulphur onwards it again becomes negative up to polonium.
• Hence the order is: O<Te<Se<S​