Question

chlorine (cl) is found in group 17 (7a) of the periodic table. chlorine is commonly found combined with sodium (na) to form table salt (nacl). when chlorine reacts with sodium, how many electrons will a chlorine atom gain or lose? gain one electron lose one electron gain two electrons lose two electrons

Explanation:

Chlorine in group 17 has 7 valence - electrons. It needs 1 more electron to achieve a stable octet configuration. So it gains one electron when reacting with sodium.

Answer:

A. gain one electron