What is removed when the ionization energy is supplied to an atom of an element? an electron. When an electron is acquired by a neutral atom, the energy change is called. electron affinity.

In general, ionization energy increases across a period and decreases down a group. Down a group, the number of energy levels (n) increase and the distance is greater between the nucleus and highest-energy electron.

Ionization energy is the energy required to remove an electron from a specific atom.

do an atom’s successive ionization energies increase regularly? Explain. Yes, they increase because it becomes more difficult to pull an electron away from an increasingly positive ion.

Since the most loosely held electron in fluorine is closer to the nucleus than chlorine, it takes more energy to remove the electron from fluorine than in chlorine. As a result, their energies are equal in magnitude but opposite in sign.

Fluorine atoms are smaller than chlorine atoms, thus it’s possible for electrons to be closer to the nuclei of fluorine atoms and experience a stronger attractive force with the nuclei. This allows fluorine atoms to take electrons more easily than chlorine atoms, and so fluorine is more reactive than chlorine.

Since the outermost electrons are further away, they are less strongly attracted by the nucleus, and are easier to remove, corresponding to a lower value for the first ionization energy.

So after it losing its one electron it becomes more stable by attaining noble gas configuration and hence more enthalpy is required to remove an electron from the stable atom hence the second ionisation enthalpy of sodium is greater than that of Magnesium.

Argon