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
Noun. 1  A collar. (a chain or belt placed around the neck of an animal) 2  A collar. (a solid circle of metal placed around the neck of a slave or prisoner) 3  A collar. (any ornament placed at the neck) ( 4 historical) A collar. (a gold chain worn about the neck as a badge of belonging to certain chivalric orders) 5  A necklace.