Question

what is electron affinity?The electron affinity values of three elements A, B and C of a group are 324, 295 and 333 kJ mol-1. Arrange these in increasing order of their atomic numbers.where in periodic table it increases and decreases?

Answer 1

Electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion. In other words, the neutral atom's likelihood of gaining an electron.