Na 1s2,2s2,2p6,3s1
3s
2p ↑
2s ↑↓ ↑↓ ↑↓
Na 1s ↑↓
<span>↑<span>↓</span></span>
<span><span>Ca 1s2,2s2.2p6,3s2,3p6,4s2</span></span>
<span><span> 4s</span></span>
<span><span> 3p ↑↓</span></span>
<span><span> 3s ↑↓ ↑↓ ↑↓</span></span>
<span><span> 2p ↑↓ </span></span>
<span><span> 2s ↑↓ ↑↓ ↑↓</span></span>
<span><span>Ca 1s ↑↓</span></span>
<span><span> ↑↓</span></span>
<span><span>O 1s2,2s2,2p3</span></span>
<span><span> 2p</span></span>
<span><span> 2s ↑ ↑ ↑</span></span>
O 1s ↑↓
↑↓
Cl 1s2,2s2,2p6,3s2.3p5
3p
3s ↑↓ ↑↓ ↑
2p ↑↓
2s ↑↓ ↑↓ ↑↓
Cl 1s ↑↓
↑↓