A.  Barium

        B.  Strontium

        C.  Calcium

        D.  Beryllium

        A.  Reduction in the electron-electrn repulsion causes the electron shells to contract; binding the electrons even more tightly to the nucleus, thus more work is done to remove the electron

        B.  Increase in the electron-proton attraction cause the electron shells to contract, thus loosening the electrons

        C.  Reduction in the electron-electron repulsion causes the electron shells to expand; thus loosening the electrons

        D.  Decrease in the electron-proton attraction cause the electron shells to expand, thus loosening the electrons

        A.  Lowest energy occupied orbital

        B.  Highest energy occupied orbital

        C.  Intermediate energy occupied orbital

        D.  Orbital next to the lowest energy occupied orbital

        A.  The addition of one or more electrons to an existing shell decreases electron-proton attraction which results in a general expansion of the atom

        B.  The addition of one or more electrons to an existing shell increases electron-electron attraction which results in a general expansion of the atom

        C.  The addition of one or more electrons to an existing shell increases electron-proton attraction which results in a general expansion of the atom

        D.  The addition of one or more electrons to an existing shell decreases electron-electron attraction which results in a general expansion of the atom

        A.  Fe3+

        B.  Fe2+

        C.  None of the above

        D.  All of the above

        A.  Halogens

        B.  Nitrogen

        C.  Noble gases

        D.  Oxygen

        A.  D-orbital that are being filled up, exert a screening effect that partly offsets the increasing nuclear charge on the outermost S-orbitals of higher principal quantum number

        B.  The amount of energy required to remove an electron from a d-orbital of higher principal quantum number is minimal

        C.  None of the above

        D.  All of the above

        A.  Al, Na, Si, Mg

        B.  Na, Mg, Al, Si,

        C.  Si, Na, Mg, Al

        D.  Mg, Na, Si, Al

        A.  Polymers

        B.  Metals

        C.  Covalent solids

        D.  Covalent liquids

        A.  Ionic bond

        B.  Intermolecular bond

        C.  Covalent bond

        D.  Metallic bond

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