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Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. Subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond.

Electronegativity difference of C and C:

ionic

covalent
Electronegativity difference of Mg and Cl:

ionic

covalent

Respuesta :

adioabiola

The bond formed by the pair of atoms on the basis of their electronegativity differences are;

  • For C and C: Covalent
  • For Mg and Cl: Ionic

According to the question;

  • We are required to evaluate the difference between the electronegativity of the pair of elements and determine if the bonds are ionic or covalent.

  • The electronegativity values of Carbon,C atom is; 2.55

  • The electronegativity values of Magnesium, Mg atom is; 1.31

  • The electronegativity values of Chlorine, Cl atom is; 3.16

For Electronegativity difference of C and C;

  • Difference = 2.55 - 2.55
  • Difference = 0
  • Therefore, the bond is covalent since the difference is less than 1.5

For Electronegativity difference of Mg and Cl;

  • Difference = 3.16 - 1.31
  • Difference = 1.85
  • Therefore, the bond is ionic since the difference is greater than 1.5.

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