Question

राइट द स्टेप्स टू डिस्प्ले नोट्स एंड स्लाइड सोर्टर व्यू​

Answer 1

Answer:

The change in energy is negative if a reaction is exothermic. That means the affinity of the electron is positive. For instance, chlorine's electron affinity has a negative sign that shows us the energy released to add an electron to an atom.

Explanation:

Electron affinity increases upward across periods of a periodic table for the groups and from left to right, because the electrons added to the energy levels get closer to the nucleus, making the nucleus and its electrons more attractive.