Silver sulfide (Ag2S) is the sulfide of silver. This dense black solid constitutes the tarnish that forms over time on silverware and other silver objects. Silver sulfide is insoluble in all solvents, but is degraded by strong acids. Silver sulfide features a covalent bond, as it is made up of silver (electronegativity of 1.98) and sulfur (electronegativity of 2.58). It is a component of classical qualitative inorganic analysis. When formed on electrical contacts operating in an atmosphere rich in hydrogen sulfide, long filaments known as silver whiskers can form.
Read more about Silver Sulfide: Structure
Famous quotes containing the word silver:
“Keep the home fires burning,
While your hearts are yearning,
Though your lads are far away
They dream of home.
There’s a silver lining
Through the dark cloud shining;
Turn the dark cloud inside out,
Till the boys come home.”
—Lena Guilbert Ford (1870–1916)