Respuesta :
Electron affinity is the amount of energy released when an electron is gained by an atom. The increasing order of the electron affinity is Kr, Sr, Cs, Ru, and Te.
What is electron affinity?
Electron affinity is the chemical property of the periodic elements that release heat when acquires an electron in a neutral atom becomes an anion.
In a periodic table, the electron affinity decreases across the period from left to right and down the group from top to bottom. The electron affinity of the elements are:
- Strontium = 5.03 kJ/mol
- Tellurium = 190.2 kJ/mol
- Krypton = -96 kJ/mol
- Ruthenium = 101.3 kJ/mol
- Caesium = 45.5 kJ/mol
Therefore, the order of increasing electron affinity is Kr, Sr, Cs, Ru, and Te.
Learn more about electron affinity here:
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