Bromine is an acceptor of electrons

acceptor circuit is the circuit which accepts only one frequency and reject the others

It has a lone pair.So it is a proton acceptor

If an acceptor atom is placed in a pure semiconductor, it will accept one or more electrons from the valence band of the semiconductor. This will permit positive holes in the conduction band to carry electrical current - the overall result is that the material will behave as a p-type semiconductor.

No. A base would be a proton acceptor. Salt is not a base.