Post Test: Chemical Reactions

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

What will most likely happen when two bromine atoms bond together?

‘which reaction would most likely require the use of an inert electrode?