The unoccupied orbital are called virtual orbitals.
⇑ Translate the sentence above by Google ⇑
Related: virtual
Prev: But the chances are against it, and there is a virtual limit on how long we Can hope to remain alive, however lucky and robust we are.
Next: Soon the wearer of a virtual reality headset will be able to be 'present' at sporting or theatrical events staged thousands of miles away.
