The electrical charge of the hydrogen atom is thought to be exactly zero. This is a consequence of the apparent equality of the magnitude of the electrical charges of the electron and the proton, and their opposite sign.
Necklace definition, a piece of jewelry consisting of a string of stones, beads, jewels, or the like, or a chain of gold, silver, or other metal, for wearing around the neck. See more. Dictionary.com
An amulet is any object (usually small in size) intended to bring good luck and/or protection to its owner, or any object believed to hold magical properties that can protect against bad luck, illness and evil. It may be used for specific purposes, or just for general good luck. Potential amulets include gems, crystals, simple stones, statues, coins, drawings, diagrams, pendants, rings, plants, animals, even words. They are often worn as a necklace or pendant, although they can be worn anywhere (the closer to the body they are worn, the more powerful their magic is believed to be).