如果把一根导电金属丝放在金属铅和二氧化铅之间,铅释放的电子会经金属丝传递到二氧化铅,这个过程会产生电流。
The bigger the difference in the electropositivity and electronegativity of the materials thatmake up a battery s electrodes, the bigger the voltage it can deliver.
组成电池两级的物质的正负电荷差越大,他们发生化学反应时产生的电伏数越大。
In the case of lead and lead dioxide, this potential difference is just over two volts per cell.
以铅和二氧化铅为例的电池,每节电池的电位差可产生2伏电压。
That much has been known since the lead-acid battery was invented.
自铅酸电池发明以来,上述的理论就已为人熟知。
However, although the properties of these basic chemical reactions have been measuredand understood to the nth degree, no one has been able to show from first principles exactlywhy lead and lead dioxide tend to be so electropositive and electronegative.
然而,尽管很大程度上我们都掌握和了解这些基础化学反应,却没有人能够真正说明最根本的原理为什么铅和二氧化铅带有这般的电正性和电负性呢?
This is a particular mystery because tin, which shares many of the features of lead, makeslousy batteries.
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