Arrange the following elements in the decreasing order of their electronegativity values.

The electronegativity order of the following elements is:

Electronegativity of beryllium $(Be)$ is approximately equal to that of

For $AB$ bond,if percent ionic character is plotted against electronegativity difference $(X_A - X_B)$,the shape of the curve would look like. The correct curve is:

If the ionization enthalpy and electron gain enthalpy of an element are $275$ and $86 \ kcal \ mol^{-1}$ respectively,then the electronegativity of the element on the Pauling scale is

Which of the following statements is not correct?