What has a pseudo-noble-gas electron configuration?

Answer 1

The pseudo noble-gas electron configuration has the outer three orbitals filled, the s, p and d- s2p6d10 (18 electrons total) and so is fairly stable. Elements that attain this electron configuration are at the right side of the transition metals (d-block).

Br-, I-, Se2-

Answer 2

An atom with a pseudo-noble-gas electron configuration has an electron configuration that resembles a noble gas element. This occurs when the atom has a full s and p subshell, like a noble gas, even though it may not be a noble gas itself. This configuration makes the atom particularly stable.