Electron Affinity Trend

[206189669]

Just to clarify, the energy that is recorded as electron affinity is the energy released, correct? For example, the energy released when an electron is added to an atom increases across a period.

[Kevin_Conrad_2E]

Yes, you are correct. Electron affinity refers to the amount of energy released when an electron is added to a neutral atom in the gaseous state to form a negative ion. It's a measure of the tendency of an atom to accept an electron.

Across a period in the periodic table, the electron affinity generally increases. This is because as you move from left to right across a period, atoms have more protons, increasing the nuclear charge. This stronger nuclear charge more effectively attracts additional electrons, leading to a greater release of energy when an electron is added.

[506047744]

Yes, electron affinity tends to increase across a period and decrease down a group.

[Sandra Espinoza 3A]

Yes, the trend for electron affinity is similar to the ionization trend. Across a period they both increase and down a group they decrease.