Chapter 5 Quantum Theory and Atomic Structure - Problems - Page 167: 29

(a) $N(nitrogen)$ and $Na(sodium)$ (b)$Ne(neon)$ and $Ar(argon)$ (c)$N(nitrogen)$ and $P(phosphorus)$

$(a)$ $N(nitrogen)$ $1s^22s^22p^3$ $Na(sodium)$ $1s^22s^22p^63s^1$ $(b)$$Ne(neon)$ $1s^22s^22p^6$ $Ar(argon)$ $1s^22s^22p^63s^23p^6$ $(c)$$N(nitrogen)$ $1s^22s^22p^3$ $P(phosphorus)$ $1s^22s^22p^63s^23p^3$