Which of the following electron sub-shells would participate in bonding with Na?

Question

Quizplus · Accepted Answer

Only an atom's valence electrons participate in bonding. Sodium (Na) is in the s-block of elements and it is in the 3rd period. So, only the 3s electrons of sodium will participate in bonds. Thus, even though the electron configuration of sodium includes electrons in the 1s, 2s, and 2p subshells, they are part of the core electrons and do not generally participate in reactions.

Which of the Following Electron Sub-Shells Would Participate in Bonding