Which of the following pairs of elements is most likely to form an ionic compound? nitrogen and sulfur sodium and aluminum magnesium and fluorine oxygen and chlorine

Magnesium and Fluorine

Explanation:

An ionic compound is formed by the bond between a metal and a nonmetal element. The metal will donate electrons, and will become a cation; the nonmetal will gain electrons and will become an anion. The bond will be formed by electrostatic force.

On the periodic table, the nonmetals are the elements on groups 3A to 7A, except for the diagonal from Boron to Polonium.

So, Nitrogen and Sulfur are both nonmetals and form a covalent compound, the same as for Oxygen and Chlorine. Sodium and Aluminium are both metals and form a metal compound. Magnesium is a metal and Fluorine a nonmetal, they form an ionic compound.

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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