What compound name belongs in box(1) in figure 3? what type of bond belongs in box (3) in figure 3?

            Box 1  = Sodium Chloride

           Box 3  =  Covalent Bond

Explanation:

Naming NaCl:

                     Ionic compounds are named as;

          i) The positive specie is named first.

          ii) The negative specie is named after.

Example: In NaCl, Sodium is the positive cation i.e. Na⁺ hence, it is named first followed by the name of negative anion which is Cl⁻ (chloride). Therefore, the name given to NaCl is Sodium Chloride.

Covalent Bond:

                This type of bond is formed between atoms by mutually sharing their valence electrons. The type of bond depends upon the electronegativity difference between the atoms. If the electronegativeity difference is greater than the bond will be polar covalent bond or if the difference is small than the bond will be non polar colvalent bond.

answer; i believe the correct answer is (c) /// is a homogeneous mixture of gaseous substance nitrogen,oxygen and smaller amounts of other substancesmixtures can be either ( homogeneous or heterogeneous)plz check first good luck