Which is the electron configuration for bromine?

Electron configuration:

The arrangement of electrons in an atom by a superscript, in each sublevel is known as electron configuration.  For example the d block elements have (n-1)d1-10 ns1-2   electronic configuration

The atomic number if bromine is 35 thus there are 35 electrons present which fill accorindg to the Hund’s rule and aufbau principle a follows:

Br-35   1s22s22p63s23p64s23d104p5

Or [Ar] 4s23d104p5

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it is the most commonly accepted one