How many of the following electron configurations for the species in their ground state are correct?
(I) Ca: 1s²2s²2p⁶3s²3p⁶4s²
(II) Mg: 1s²2s²2p⁶3s¹
(III) V: [Ar] 3s²3d³
(IV) As: [Ar] 4s²3d¹⁰4p³
(V) P: 1s²2s²2p⁶3p⁵

Question

Quizplus · Accepted Answer

The correct electron configurations are for Mg and P. The notation used in the question is unconventional, but interpreting it as an attempt to describe electron configurations, Mg and P are described accurately for their ground states, while the others contain errors in the notation or electron count for the given elements.

How Many of the Following Electron Configurations for the Species