What is meant by electron affinity?

What is meant by electron affinity?

1 : the degree to which an atom or molecule attracts additional electrons. 2 : the minimum energy required to remove an electron from a negative ion to produce a neutral atom or molecule.

What is electron affinity class 11?

Electron affinity is defined as the amount of energy released when an electron is added to a neutral atom to form an anion. It is the change in the potential energy of an atom when an electron is added to a neutral gaseous atom to form a negative ion. The unit of electron affinity is KJ per mole (KJmol).

What is electron affinity and electronegativity?

Electronegativity refers to the ability of the atoms to attract the electrons from the other elements. Electron affinity refers to the amount of energy that is liberated whenever a molecule or a neutral atom tends to acquire an electron from the other elements. It is associated with the atom present in a molecule.

What causes electron affinity?

The electron affinity is a measure of the attraction between the incoming electron and the nucleus – the stronger the attraction, the more energy is released. The factors which affect this attraction are exactly the same as those relating to ionization energies – nuclear charge, distance and screening .

What is electron affinity factor?

The electron affinity is a measure of the attraction between the incoming electron and the nucleus – the stronger the attraction, the more energy is released. The factors which affect this attraction are exactly the same as those relating to ionization energies – nuclear charge, distance and screening.

What is electron affinity in semiconductor?

For a semiconductor, instead of the work function, the most. important property critical to junction-based devices or materials is. the electron affinity, which is the energy difference between the. conduction band minimum (CBM) to the vacuum energy level.

What is electron affinity and electron gain enthalpy?

Electron affinity is the amount of energy released when a neutral atom or a molecule (in the gaseous phase) gains an electron from the outside. Electron gain enthalpy is the change in enthalpy when a neutral atom or a molecule gains an electron from outside.

Why is electron affinity important?

Importance Electron affinity can reflect the ability of an atom to gain electrons. The smaller the first electron affinity, the easier an atom gains electrons. The greater the electron affinity, the weaker is the ability of an atom to gain electrons.