The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound.

Sulphur has atomic number of 16 means it has 16 electrons and 16 protons in its neutral state.

The electronic configuration is 1s², 2s²2p6,3s²3p4. 2,8,6

That it has 6 electron in the valence shell means it needs two electron to complete it's octet configuration Sulphur reacts with two hydrogen atoms each with 1 electron to form hydrogen compound and to complete its octet structure.

H (1s¹) + H (1s¹) + S (3p4) = H2S (g)