Question: what is the correct electron configuration for vanadium (ii) ion?
Answer: Vanadium's electron configuration is 1s22s22p63s23p64s23d3. Vanadium is a d-block transition metal, therefore we remove the two valence electrons from the 4s subshell to form vanadium(II), giving us 1s22s22p63s23p63d3. Alternatively, this can be written using the symbol [Ar] to represent the noble gas core; [Ar]3d3.