How is crytalline NaCl formed from constituent elements?

Explanation

When a Na-atom combines with Cl-atom, the electron lost by the electropostive Na-atom is gained by the electronegative Cl-atom, resulting in the formation of `Na^(+) and Cl^(-)` ions respectively, each having inert gas configuration. The oppositely charged ions are bound by strong electrostatic force of attraction to form an ionic, crystalline solid, NaCl.
`underset([2,8,1])(Na^(*))+underset([2,8,7])( * underset(* *)overset(* *)(Cl) : ) to underset([2,8])([Na]^(+))+underset([2,8,8])([: underset(* *)overset(* *)(Cl):]^(-) to NaCl`
In the crystal of NaCl, each `Na^(+)` ion is surrounded by `6Cl^(-)` ions ann each `Cl^(-)` ion is surrounded by `6Na^(+)` ions, this results in the formation of a thre dimensional crystal, where the lattice sites are alternately occupied by `Na^(+) and Cl^(-)` ions.