Any time you see a group of elements in parentheses like that it represents a polyatomic ion.
When it comes second (after the Ti, in this case) it has a name that's going to end in ATE or ITE.
BrO2^1- is bromite.
(BrO3^1- is bromate and
BrO4^1- is perbromate and
BrO^1- is hypobromite.
Other polyatomic - ions you'll see:
(these are worth memorizing)
CO3^2- = carbonate
NO3^1- = nitrate, NO2^1- = nitrite
PO3^3- = phospate
SO4^2- = sulfate
ClO3^1- = chlorate, and others which follow the bromate pattern
NH4^1+ = ammonium, is a polyatomic +ion.
When it comes second (after the Ti, in this case) it has a name that's going to end in ATE or ITE.
BrO2^1- is bromite.
(BrO3^1- is bromate and
BrO4^1- is perbromate and
BrO^1- is hypobromite.
Other polyatomic - ions you'll see:
(these are worth memorizing)
CO3^2- = carbonate
NO3^1- = nitrate, NO2^1- = nitrite
PO3^3- = phospate
SO4^2- = sulfate
ClO3^1- = chlorate, and others which follow the bromate pattern
NH4^1+ = ammonium, is a polyatomic +ion.