Hydrogen (H₂)

Colourless, odourless, lighter-than-air gas. The most common chemical element in the universe.

Hydrogen chloride (HCl)

A colourless gas with a pungent odour, its solution in water is called hydrochloric acid.

Palmitic acid (hexadecanoic acid) (C₁₅H₃₁COOH)

A white, waxy substance, a carboxylic acid of high carbon number.

Pentane (C₅H₁₂)

The fifth member in the alkane homologous series. A colourless, combustible liquid.

Clothing (Western Europe, 15th century)

Clothing reflects the lifestyle and culture of the region's inhabitants.

Ammonium ion (NH₄⁺)

A compound ion generated when a proton is added to an ammonia molecule.

Silver nitrate (AgNO₃)

One of the raw materials of traditional photography.

Phosphate ion (PO₄³⁻)

A compound ion formed when a phosphoric acid molecule releases a proton.

Glycylglycine (C₄H₈N₂O₃)

The simplest peptide, formed from two glycine molecules by a peptide bond.

Glycerol (propane-1,2,3-triol) (C₃H₈O₃)

A triol that is often used as an ingredient of creams and ointments.

Building shapes (multi colour)

Build 3D shapes from unit cubes with the help of several views.

Ethane (C₂H₆)

The second member in the homologous series of straight-chain alkanes.

Sulphate ion (SO₄²⁻)

A compound ion produced when sulphuric acid releases protons.

Trans-2-butene (C₄H₈)

A colourless, heavier-than-air gas. Its geometric isomer is cis-2-butene.

Nitrate ion (NO₃⁻)

A compound ion, the main source of nitrogen for plants.

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