Examlex
Which of the following anions has the lowest number of oxygen atoms per formula unit?
Electroscope
A device used to determine whether an object contains a positive or negative charge.
Polarity
The characteristics of a device that exhibits opposite quantities within itself: positive and negative.
Electrostatic Charge
A stationary electric charge built up on the surface of a material, typically caused by contact or friction.
Lightning Arrestor
A protective device that diverts surge voltages from lightning strikes away from electronic equipment or electrical installations, minimizing damage.
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