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 barium-to-fluorine bond in Ba-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