Ammonia 3D Molecular Model — CAS 7664-41-7
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Free educational Ammonia model (H3N, CAS 7664-41-7) with an engraved element symbol on every atom.
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Ammonia (H3N, CAS 7664-41-7) — a free educational 3D molecular model for teachers and students, by MolGod.org. Read the atoms directly: each sphere bears an engraved element symbol.
No ring closes anywhere in Ammonia, which makes it a good open-chain example: 4 atoms, 3 bonds, all of them single. A five-minute warm-up: read the symbol on every sphere and write down the totals (3 H + 1 N = 4 atoms). On paper the molecule offers 1 donor and 1 acceptor for hydrogen bonding (computed); ask students which atoms they expect to take part.
MolGod.org offers this engraved model free to anyone teaching or learning chemistry. Teachers: give each table a model and have students write the formula from the engraved atoms.
Full record and more free models: https://molgod.org/molecule/7664-41-7/?utm_source=printables&utm_medium=referral&utm_campaign=edu-3d-models
Licence & provenance: https://molgod.org/licenses/stl/7664-41-7/
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Ammonia-3D-molecular-model-engraved-CAS-7664-41-7.stl
A ball-and-stick model of Ammonia with each element symbol recessed into its atom sphere, generated by MolGod.org from a PubChem-computed 3D conformer (not an experimental crystal structure); atomic coordinates and connectivity are unchanged. STL mesh: 38,454 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.
Names in other languages: Ammoniak (de); ammoniac (fr); ammoniaca (it); ammoniak (nl); amoniak (pl); 氨 (zh).
Chemical identity
CAS Registry Number: 7664-41-7
Molecular formula: H3N
Molar mass: 17.031 g/mol (exact mass 17.026549100)
IUPAC name: azane
MolGod ID: MG_380-302-726-03 (https://molgod.org/id/MG_380-302-726-03)
PubChem CID: 222 (https://pubchem.ncbi.nlm.nih.gov/compound/222)
Wikidata: Q4087 (https://www.wikidata.org/wiki/Q4087)
EC number: 231-635-3
ChemSpider ID: 217
InChIKey: QGZKDVFQNNGYKY-UHFFFAOYSA-N
SMILES: N
Required attribution (CC BY-SA 4.0): "Ammonia 3D model by MolGod.org — https://molgod.org/molecule/7664-41-7/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/