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Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Describing intermolecular forces use the drop down menus to match the type of intermolecular force to its name dipole dipole interactions dipole induced dipole interactions london dispersion forces hydrogen bond van der waals forces done

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)