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[Ar] 3d10 4s2 4p5 is the electron configuration of bromine
Technically there is only one phase unless you account for a solution where you have a pure liquid with something dissolved in it. Unless you count aqueous as a phase which is just dissolved. Since you are in high school the answer you are looking for is one. <span />
NaCI is the answer, in what my teacher taught me.
Hope I helped :)