Type the complete electron configurations for each of the element and ion below. Bold the valance electron(s) in your electron configurations.
a) V: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³
b) Ru²+: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵