this is troubling me can you help

Question

what is the Comparoson and contrast the formation of bonds, lattice structure, electron distribution and physical properties between ionic and molecular compounds by using sodium chloride and water as examples.

Answer 1

NaCl = ionic 

H2O = molecular (covalent)

 

Formation of ionic bond: no sharing of electrons, but Na donates an electron to become Na⁺ and Cl accepts the electron to become Cl^-.  The bond is formed by coulombic attraction of + and - charges.

Formation of molecular compound: Each H atom in H2O shares it's lone electron with the oxygen atom.

 

Lattice structure of NaCl: endlessly repeating series of Na and Cl ions where each Na ion is in contact with 6 Cl ions and each Cl ion is in contact with 6 Na ions. 

Lattice structure of H2O:  solid water (ice) has a lattice structure that is hexagonal packing.  Liquid water is not considered as a lattice.

 

Electron distribution for NaCl:  see above binding.  The Na cation has lost it's valence electron and the Cl anion has gained that extra electron.  For water, the electrons are shared and distributed between the H and O.

 

Physical properties:  Ionic compounds generally have higher melting points than molecular compounds, and they also have higher conductivity than molecular compounds.