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McDeirdree
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Atomic Radius
(covalent radius) of an atom is defined as half the distance between the nuclei of two atoms of the same element that are joined together by a single covenent bond
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First Ionisation Energy
of an atom is the minimum energy required to completely remove the most loosely bound electron from one mole of a neutral gaseous atom, in the ground state
X (g) → X +(g) + e --
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Electronegativity
the relative attraction that an atom in a molecule has for the shared pair of electrons in a covalent bond
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