What is the formula for copper$(I)$ sulfide$?$

Hint :Chemical symbols with two letters always have the first letter capitalized and the second letter written in lower case. Transition metals can form different ions. The charge will be shown in the compound name as a Roman numeral.

Complete Step By Step Answer:
The number preceding an element symbol or compound formula tells how many atoms or molecules. If no number appears before the symbol, there is only one or molecule. Addendum numbers in compound equations address the number of particles or atoms quickly going before the addendum. On the off chance that no addendum follows the substance image, just one of the components or compounds happens in the atom. Superscript numbers and signs represent the charges of ions. Ions can be individual atoms or polyatomic. Most polyatomic ions have negative charges. Negative charges happen when the number of electrons is greater than the number of protons. Positive changes occur when the number of protons exceeds the number of electrons.
So, the formula for copper$(I)$sulfide is $CuS$.

Additional Information:
Copper sulfide has a place with a group of substance mixtures and minerals. It very well may be arranged into three groups, specifically monosulfide, disulfide, and blended monosulfide. Copper sulfide happens normally in nature as a mineral called covellite. It conducts power tolerably. Both manufactured materials and minerals contain copper sulfide. Copper sulfide has applications in the sun oriented cells, Superionic transmitters, Photodetectors, Electroconductive terminals, Photothermal change gadget, Microwave protecting covering, Active sponges of radio waves, Gas sensors, Polarizers of infrared radiation.

Note :
$Cu_2S$ can be prepared by heating copper strongly in sulfur vapor or ${H_2}S$. The reaction of copper powder in molten sulfur rapidly produces $C{u_2}S$, whereas pellets of copper require a much higher temperature.