BCl3 is the formula for Boron Chloride. As a matter of interest it does not obey the octet rule. It is also called a Lewis Acid.
Boron is an element.
BCl3
Boron is an element and contains only atoms of Boron.
The formula for the ionic compound barium chloride is BaCl2.
Ionic compounds do not have prefixes but covalent compounds have prefixes. “Aluminum chloride” is a ionic compound and "boron tri-chloride” is a covalent compound.
Formula: BCl3
boron tetra chloride
Boron is an element.
BCl3
Boron is an element and contains only atoms of Boron.
Formula: BF3
There is no compound with the formula Al2Cl3. But AlCl3 is aluminum chloride.
The formula for the ionic compound barium chloride is BaCl2.
Ionic compounds do not have prefixes but covalent compounds have prefixes. “Aluminum chloride” is a ionic compound and "boron tri-chloride” is a covalent compound.
BF3
BBr
Copper(II) chloride is already a compound; its formula is CuCl2