Question

List the following bonds in order of increasing ionic character. (Enter your answer in the format H-O for the hydrogen-to-oxygen bond in H2O. Use the appropriate <, =, or > symbol to separate substances in the list.) the sodium-to-fluorine bond in Na-F the magnesium-to-oxygen bond in MgO the lithium-to-lithium bond in Li the chlorine-to-fluorine bond in ClF3 the iron-to-oxygen bond in Fe-O

Answer 1

The ionic bonds are formed between two oppositely charged ions. Generally a highly electropositive element and a highly electronegative element. The group 1, 2, 3 elements majorly forms ionic bond with group 15, 16 and 17 elements. The more the electronegativity deference, the stronger is the ionic bond.

The order of electropositivity or groups are Gr 1> 2> 3

Similarly, The order of electronegativity or groups are Gr 15< 16< 17

The more the electropositivity and electronegativity of the elements in an ionic compound, the stronger is the ionic bond.

Now the given compounds- NaF- Na is group 1 element, F is group 17 element. Hence the strongest ionic bond.

MgO- Mg is group 2 element, O is group 16 element. Hence less stronger than NaF.

Li-Li bond. Here both the atoms are lithium with same electropositivity. Thus it wont form ionic bond as there is no deference.

Cl-F Here there is an electronegativity deference.

F-O Here the electro negativity deference is less than F-Cl

Thus the order of ionic strength is -

   Na-F > Mg-O > F-Cl > F-O > Li-Li