Names: Iron(II) sulfide, Iron sulfide, Ferrous sulfideBlack iron sulfide, Protosulphuret of iron, Ferrous sulphide, Iron(II) sulphide
Appearance: Gray, sometimes in lumps or powder
PbO
Names: Lead(II) oxide, Lead(ii) oxide, Lead monoxidePlumbous oxide, Lead protoxide, Litharge
Appearance: Red or yellow powder ; Red-to-yellow crystals
CO2
Names: Carbon dioxide, {{plainlist|, CO2Carbonic acid gas, Dry ice, [CO2], Carbonic anhydride, R-744, E-290, E 290, E290, Carbonic acid anhydride, Carbon-12 dioxide, Methanedione, Carbon oxide, CO₂, [Note: Normal constituent of air (about 300 ppm)].
Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxideDihydrogen monoxide (DHMO) (systematic name), Hydrogen monoxide, Dihydrogen oxide, Hydric acid, Hydrohydroxic acid, Hydroxic acid, Hydrol, Μ-oxido dihydrogen, Κ1-hydroxyl hydrogen(0)
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas