Question

What is the formula of the ionic compound formed between chlorine (Cl) and aluminum (Al)? AlCl, because aluminum loses three electrons and chlorine gains three electrons. AlCl3, because aluminum loses three electrons and chlorine gains one electron. ClAl, because chlorine gains one electron and aluminum loses one electron. ClAl3, because chlorine gains three electrons and aluminum loses one electron.

Answer 1

Answer: AlCl3, because aluminum loses three electrons and chlorine gains one electron.

Aluminium chloride is a salt with ionic bonds.  

Aluminium (metal from group 13) lost three electrons and form cation with postive charge 3+.

Chlorine (nonmetal from group 17) gain one electronand form anion with negatove charge.