First ionization energy - The first ionization energy is the energy required to remove the most loosely held electron from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+. This is more easily seen in symbol terms.
In simpler terms the first ionization energy is the energy required to remove the first electron from an atom, thus producing an ion with a 1+ charge.
Electronegativity - Electronegativity is the ability of an atom to attract electrons to itself in a covalent bond. The Pauling scale is the most commonly used. Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to caesium and francium which are the least electronegative at 0.7.
definitions from www.chemguide.co.uk/
In simpler terms the first ionization energy is the energy required to remove the first electron from an atom, thus producing an ion with a 1+ charge.
Electronegativity - Electronegativity is the ability of an atom to attract electrons to itself in a covalent bond. The Pauling scale is the most commonly used. Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to caesium and francium which are the least electronegative at 0.7.
definitions from www.chemguide.co.uk/
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