Question

Write the atomic cores for potassium and chloride ion

Answer 1

The electron distribution of potassium ion is:

$$1s^22s^22p^63s^23p^64s^0$$

1. Where $4s^0$ are valence electrons and $1s^22s^22p^63s^23p^6$ is atomic core
2. The electron distribution of chlorine ion is:

$$1s^22s^2p^63s^23p^6$$

Where $3s^23p^6$ are valenece electrons and $1s^22s^22p^6$ is atomic core