The electronegativity of calcium (Ca) is 1 and that of chlorine is 3.16. Since the difference is greater than 2, it implies that the bond between Mg and O in MgO is ionic. Therefore, the electronegativity difference is, The electronegativity of magnesium (Mg) is 1.31 and that of oxygen is 3.44. Since the difference is greater than 2, it implies that the bond between Na and Cl in NaCl is ionic. The electronegativity of sodium (Na) is 0.93 and that of chlorine is 3.16. The following image shows the periodic table of elements with the electronegativity values. Typically, the values range from 0.7 to 4. This scale can be applied to determine the electronegativity values of the elements in the periodic table. On this scale, electronegativity is a dimensionless quantity and does not have any unit. The scale is named after American chemist Linus Pauling, who is credited with having discovered electronegativity. The most prominent scale is known as the Pauling scale. How to Find Electronegativity ValuesĮlectronegativity can be quantified using several scales. The more electronegative an atom is, the higher will be the attractive force. It is caused by the attractive electrostatic force between the positively charged nucleus and the negatively charged electrons.
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