When element 20A combines with element 8Y,

an ionic compound, A2Y is formed

a covalent compound, AY2 is formed

WAEC SSCE - Chemistry - 2011 (Objective)

Question 1 Report

The energy change that accompanies the addition of an electron to an isolated gaseous atom is

bond energy

electronegativity

electron affinity

ionization energy

Answer Details

The energy change that occurs when an electron is added to an isolated gaseous atom is called "electron affinity." This process involves adding an electron to a neutral atom, which then becomes a negatively charged ion. Electron affinity is a measure of how much energy is released or absorbed when this happens. If energy is released, the electron affinity is negative, meaning the atom is more likely to attract electrons. If energy is absorbed, the electron affinity is positive, meaning the atom is less likely to attract electrons. The electron affinity is related to the ionization energy, which is the energy required to remove an electron from an atom.

Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)






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