Viết hai giai đoạn của sự hình thành CaO

Giai đoạn 1: Hình thành các ion trái dấu từ các quá trình Ca nhường electron và O nhận electron.

$\begin{array}{l}Ca\to C{a}^{2+}+2e\\ Soelectrontrencaclop2,8,8,22,8,8\\ Cauhinhelectron\text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}[A\hspace{0.17em}r]}4s^2\text{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}[A\hspace{0.17em}r]}\end{array}$

$\begin{array}{l}O+2e\to O^{2-}\\ Soelectrontrencaclop2,62,8\\ Cauhinhelectron1s^{2}2s^{2}2p^{4}1s^{2}2s^{2}2p^6\end{array}$