Question

If a combination reaction takes place between rubidium and bromine, the chemical formula for the product is _____. rb2br rbbr rubr rbbr2

Answer 1

The oxidation number of rubidium, Rb is +1 (meaning it needs to lose 1 electron to be able to react) while that of bromine is -1 (meaning it needs to gain 1 electron to be able to react). Therefore, Rb and Br must form a compound with chemical formula RbBr.