Ionization enthalpy: The energy required to remove

The energy required to remove an electron from the gaseous atom is known as Ionization enthalpy . The energy required to remove the 1st electron from an isolated atom is called first ionization enthalpy . Thus, it is a quantitative measure of how much a gaseous atom is capable of losing its electrons. In chemistry, ionization enthalpy is mainly influenced by two factors: (i) Repulsive forces between electrons and (ii) Attractive forces between electrons and the nucleus. Moreover, in this ... This lesson covers the concept of ionization enthalpy as per the NCERT syllabus for CBSE Class 11. You will learn about the energy required to remove an electron from a gaseous atom, factors affecting ionization enthalpy , trends across periods and groups, and exceptions in periodic trends. Learn what ionization enthalpy is, how it depends on penetration, shielding and electronic configuration effects, and how it varies across a period and a group in the periodic table. Test your knowledge on ionization enthalpy with MCQs. Question 1. Are ionisation enthalpy and ionisation energy the same? Answer: Apparently the two terms are used interchangeably, but to be more precise energy is expressed in terms of Joules, whereas enthalpy is expressed in terms of Joules per mole. Energy is the state of matter and enthalpy is a form of energy change between two states.