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Natural forms · Powders & solids: 14 3D models
Every element as an atom, orbitals and bonding, crystals, ions and complexes, real compounds from every field of chemistry, substances in their natural form, electrochemistry and lab experiments (real sizes atoms → lab bench). Each one is a ready-made 3D model you can turn, recolour and place in a figure — open BioDioRama and type its name in the Library search.
- Washing soda (sodium carbonate) — Clear crystals of sodium carbonate decahydrate that turn white and powdery in air. (Na₂CO₃·10H₂O) (≈ 5–20 cm (a lab sample))
- Chalk sticks (calcium carbonate) — Soft white chalk — calcium carbonate from the shells of tiny marine organisms. (CaCO₃) (≈ 5–20 cm (a lab sample))
- Silica gel beads (indicating) — Indicating silica gel: orange when dry, turning green-colourless as it absorbs water. (SiO₂) (≈ 5–20 cm (a lab sample))
- Copper(II) carbonate powder — Green basic copper carbonate — it turns black (CuO) on heating. (CuCO₃·Cu(OH)₂) (≈ 5–20 cm (a lab sample))
- Iron(III) oxide (rust) — Red-brown iron(III) oxide — rust, haematite and the pigment red ochre. (Fe₂O₃) (≈ 5–20 cm (a lab sample))
- Chromium(III) oxide (green) — Dull green chromium(III) oxide pigment. (Cr₂O₃) (≈ 5–20 cm (a lab sample))
- Lead(II) iodide (golden) — Bright yellow PbI₂ — the "golden rain" precipitate. (PbI₂) (≈ 5–20 cm (a lab sample))
- Prussian blue pigment — The first synthetic blue pigment, iron(III) hexacyanoferrate(II). (Fe₄[Fe(CN)₆]₃) (≈ 5–20 cm (a lab sample))
- Ammonium dichromate — Orange crystals — ignited, they decompose into a "volcano" of green Cr₂O₃ (toxic). ((NH₄)₂Cr₂O₇) (≈ 5–20 cm (a lab sample))
- Ice cubes — Solid water — less dense than liquid water, so it floats. (H₂O) (≈ 5–20 cm (a lab sample))
- White powders (baking soda, slaked lime, ZnO, TiO₂, starch, anhydrous CuSO₄) — White powders that look the same — which is why chemists label everything and test unknowns. Show one of them with “Show”. (≈ 5–20 cm each)
- White pellets, prills and granules (NaOH, KOH, urea, NH₄NO₃, CaCl₂) — Sodium hydroxide pellets, potassium hydroxide flakes, urea and ammonium nitrate prills and calcium chloride granules. Show one of them with “Show”. (≈ 5–20 cm each)
- White lumps (marble chips, quicklime) — Marble chips (calcium carbonate) and quicklime (calcium oxide): both white lumps. Show one of them with “Show”. (≈ 5–20 cm each)
- Black powders (copper(II) oxide, manganese dioxide) — Black copper(II) oxide and black manganese(IV) oxide (the catalyst for decomposing hydrogen peroxide). Show one of them with “Show”. (≈ 5–20 cm each)