93考題精選 93考題精選

t can be inferred from the passage
that an electride behaves most like a
normal ionic crystal when the electride
has which of the following features?
The anionic cavities are widely
separated.
All of the trapped electrons are
able to delocalize.
The trapped electrons are liberated
by impinging photons.
The ions are tightly packed together.
Most of the cations have lost their
electrical charge.

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答案：(A)
　　在各種最簡(jiǎn)單和最為人熟知的晶體中，離子鹽即是其中之一，其典型的實(shí)例就
是氯化鈉，或普通佐餐食鹽。離子鹽的基本成分是離子：那些由于獲得或失去了一
個(gè)或多個(gè)電子而變成帶有電荷的原子或分子。例如，在形成氯化鈉的過(guò)程中，同原