Elements:
* Metals: Gold (Au), Silver (Ag), Iron (Fe), Copper (Cu), etc.
* Nonmetals: Nitrogen (N), Oxygen (O), Phosphorus (P), Sulfur (S), Chlorine (Cl), etc.
* Noble Gases: Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn)
Compounds:
* Oxides: Sodium oxide (Na₂O), Magnesium oxide (MgO), Aluminium oxide (Al₂O₃)
* Halides: Sodium chloride (NaCl), Potassium bromide (KBr), Calcium fluoride (CaF₂)
* Sulfides: Lead sulfide (PbS), Zinc sulfide (ZnS), Copper sulfide (CuS)
* Nitrides: Boron nitride (BN), Silicon nitride (Si₃N₄), Titanium nitride (TiN)
Note: Some substances might contain traces of hydrogen or carbon due to impurities, but they are not considered to be essential components of the substance itself.
