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
One of the most underappreciated features of a piece of jewelry is its clasp. A jewelry clasp, or jewelry fastener, is the mechanism that allows a necklace or bracelet to easily be put on and taken off without causing any damage. Some fasteners are meant to be hidden, while others are a key element to the design.