Most transition metals from several cations having __________configurations.

Options

A. pseudo noble gas
B. noble gas
C. both pseudo noble gas and noble gas
D. neither pseudo noble gas nor noble gas

Answer

A

Explanation

For example, iron forms the cations `Fe^(2+)` and `Fe^(3+)`. Neither has a noble gas configuration as that requires an energetically impossible loss of 8 electrons from the neutral atom, `Fe([Ar]3d^64s^2)`.