Hydrogen combines with sulfur much like hydrogen combines with oxygen draw an electron dot diagram showing hydrogen combined with sulfur and write the chemical formula below

hydrogen combines with sulfur is H2S

 hydrogen combines with oxygen H2O Hydrogen sulfide is the chemical compound with the formula H
2S. It is a colorless gas with the characteristic foul odor of rotten eggs; it is heavier than air, very poisonous, corrosive, flammable, and explosive; properties shared with the denser hydrogen chalcogenides

 

Rn in the right answer