Explain why a sodium atom and a chlorine atom undergo an iconic bond?

Sodium is an alkali metal, so it has an electronegativity that is far less than Chlorine. What this means is that Chlorine has a higher tendency to attract electrons from Sodium, which is what defines ionic bonds.

Explanation:

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).