The cell membrane is made, in addition to proteins, of and is selective or , as it allows only certain molecules to pass in and out.

It will appear as o2(g) as a reactant 

Hi + naoh -> h2o + nal

Deposition  is  change of state has the wrong energy change listed 

Bromine has atomic number  35  which means there are  35 protons  and  44  neutrons to give a total of 79 nucleons. the fact that it's a positive ion means that it has lost an electron; so there'll be  34 electrons.