Question

Which element has the electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d3?

Answer 1

If you are referring to a neutral atom, then Vanadium (V) has that particular electron configuration.

Remember that for neutral atoms, the number of electrons must equal the atomic number. Adding up all the electrons from the given configuration will give

`"number of e"^(-) = 2+2+6+2+6+2+3 = 23`

This means that the atom you're looking for has an atomic mass of 23, which corresponds to the atomic mass of Vanadium, a transition metal located in the fourth row, group 5 of the periodic table.

Vanadium's noble gas shorthand notation is

`"V": ["Ar"]4s^(2)3d^(3)`