Which pair of elements is most likely to form an ionic compound?*sodium and aluminum*oxygen and chlorine *nitrogen and sulfur*magnesium and fluorine
magnesium and flourine
Metals and nonmetals tend to form ionic bonds.

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Nonmetals and nonmetals tend to form covalent bonds. Mg is a metal and F is a nonmetal. N and S are both nonmetals. O and Cl are both nonmetals. Na and Al are both metals.
upper rightYes. Covalent compounds are formed from elements with small differences in electronegativity, or nonmetal elements. These are found in the upper right corner of the periodic table.
Which of the following contains only covalent bonding and no ionic bonding?*NaOH *Na2SO4*CCl4*Ca(NO3)2
CCl4Yes. In Na2SO4, Ca(NO3)2, and NaOH a polyatomic ion is coupled with a metal cation. While covalent bonds attach atoms within the polyatomic ion, ionic bonds connect these polyatomic ions to the metal cations. Only CCl4, which contains 4 C-Cl bonds (which involve bonding between two nonmetallic elements), contains covalent bonds and no ionic bonds.
polar, with the chlorine end having a partial negative charge.Yes. As chlorine is more electronegative than phosphorous, the chlorine end of the bond will have a partial negative charge. A P-Cl bond would be polar.

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Which bond is most polar? You will have to look up a table of electronegative to answer this question. Cl‒ClI‒ClP‒ClP‒I
P‒ClYes. Phosphorous and chlorine have the greatest difference in electronegativities. Therefore, the P-Cl bond is the most polar.
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