Answer:
The correct answer is: cubic or isometric crystal system
Step-by-step explanation:
The cubic crystal system, also known as the isometric crystal system, is one of the seven crystal systems, that has a cubic unit cell.
It can be classified into three types: simple cubic system, body-centered cubic system (bcc) and face-centered cubic system (fcc).
The salt, sodium chloride, forms isometric crystals and thus is part of the cubic or isometric crystal system.