Question

A bromine atom in the excited state could have an electron configuration of

Answer 1

An excited state of a bromine atom has an altered electron configuration, with one or more electrons moving to higher energy orbitals such as 4d or 5s, diverging from its ground state configuration of [Ar]4s²2p²5.

Step-by-step explanation:

The question relates to an excited state of a bromine atom. Bromine normally has seven valence electrons in its ground state, with the electron configuration of [Ar]4s²2p²5. When a bromine atom enters an excited state, one or more electrons move to a higher energy orbital. For example, an electron may move from the 4p subshell to the 5s or 4d subshells. The excited state configuration could be [Ar]4s²2p²4 4d²1 or similar variations, showing that an electron has moved from a 4p orbital to a 4d orbital.

Answer 2

A bromine atom in the excited state could have an electron configuration of 4.

The valence electrons are excited, and therefore are reactive.