What is the name of #CuBr#?
Copper Bromide. or Copper I Bromide.
Copper has oxidation numbers of +1 or +2
Bromide has a common charge of -1
This can be called Copper I bromide more precisely .or somewhat redudanately Copper mono bromide.
An older form of naming would be Cupous Bromide. Indicating a +1 charge on Copper. Cupric Bromide would be
The name is copper(I) bromide.
The name follows the general form
name-of-metal stem-of-nonmetal + -ide
The stem of the nonmetal is brom-, so the second part of the name is bromide
The charge on the bromide ion is -1, so the copper ion has a charge of +1.
We write the charge as a Roman numeral in parentheses immediately after the name of the metal (no spaces).
The name of the metal ion is copper(I).
The complete name is copper(I) bromide.