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Ionization Energy

Ionization Energy. UDZ, Raji v (who has a question) Ja mes An kit. cool brain. Ionization Energy. Ionization Energy is energy required to remove an electron from the atom To separate electrons from atoms, a sufficient amount of energy is needed to overcome the attraction of nuclear charge

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Ionization Energy

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  1. Ionization Energy UDZ, Rajiv(who has a question)James Ankit cool brain

  2. Ionization Energy • Ionization Energy is energy required to remove an electron from the atom • To separate electrons from atoms, a sufficient amount of energy is needed to overcome the attraction of nuclear charge • Since ionization NEEDS energy to overcome the attraction, it is considered an endothermic process and its values are ALWAYS positive. • Example of Magnesium

  3. Trend • Ionization Energy INCREASES across a period • Ionization Energy DECREASES down a column

  4. Key Factors Controlling the Trends • The ionization energies of atoms is a balance between electon-nuclear attraction aka Z* and electron-electron repulsion.

  5. Electron-Electron Repulsion • The reason for exceptions to the trend is electron-electron repulsion. • Lets take Oxygen for example • The electron configuration for Oxygen is 1s2 2s2 2p4 • This means that one of the 3 orbitals in the P shell has two electrons inside, while the other 2 orbital only has 1 electron. The orbital with 2 electrons undergoes an electron-electron repulsion thus making it easier for Oxygen to lose that 1 electron compared to Nitrogen which has 1 electron in each of the P orbitals and would not have an electron-electron repulsion.

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