What roman numeral should be assigned to copper when naming the compound CuBr2?

copper (ii)

Explanation:

fyi, for this, you can just look up the chemical compound and it will show you

Bromine is an e belongs to the halogen family with atomic number 35. Bromine has 7 valence electrons and the valency of bromine is 1. Thus, since you have 2 bromine, that means that the copper has 2 extra elections thus (II)

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa