Which statement best describes how atoms combine to form sodium chloride (nacl)? a. a positively charged sodium ion and a positively charged chlorine ion form an covalent bond. b. a positively charged sodium ion and a negatively charged chlorine ion form an covalent bond. c. a positively charged sodium ion and a positively charged chlorine ion form an ionic bond. d. a positively charged sodium ion and a negatively charged chlorine ion form an ionic bond.

The answer is D. A positively charged sodium Ion and a negatively charged chlorine ion form an ionic bond.

Option (D) is the correct answer.

Explanation:

A bond generated after transfer of an electron from one atom to another is known as an ionic bond. And, a bond generated by sharing of electron(s) between two atoms is known as a covalent bond.

Sodium is a metal with atomic number 11 and electronic distribution 2, 8, 1. On the other hand, chlorine is a non-metal with atomic number 17 and electronic distribution 2, 8, 7.

So, in order to attain stability sodium will lose one electron and develop a positive charge as . Whereas chlorine at the same time will take up one electron from sodium atom and acquire a negative charge as .

Thus, we can conclude that the statement a positively charged sodium ion and a negatively charged chlorine ion form an ionic bond.

the dissolution of polymer can be thermodynamically described in 2 steps.