Ionization energy
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In physics and chemistry, ionization energy is the minimum energy required to remove the most loosely bound electron of an isolated gaseous atom, positive ion, or molecule. The first ionization energy
These electron configurations do not show the full and half-filled orbitals.
Here the added electron has a spin opposed to the other 2p electrons. This decreases the ionization energy of oxygen
Because of a single p-orbital electron in gallium's configuration, makes the overall structure less stable, hence the dip in ionization energy values
Actinium's electron configuration predetermines that it would require less energy to remove that single d-orbital electron, therefore even though it has a larger EC, radium still has the higher IE
Flerovium
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Flerovium is a synthetic chemical element; it has symbol Fl and atomic number 114. It is an extremely radioactive, superheavy element, named after the Flerov Laboratory of Nuclear Reactions of the Joi
Stamp of Russia, issued in 2013, dedicated to Georgy Flyorov and flerovium