Shapes of Molecules Set
Product Code : EL-MM-11008
Quick answer: The Shapes of Molecules Set is a VSEPR model kit for teaching molecular geometry. It builds eight example molecules, from linear HCl and BeCl2 through bent H2O, trigonal planar BH3, pyramidal NH3 and tetrahedral CH4 to trigonal bipyramidal PCl5 and octahedral SF6, with brown parts for lone pairs. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Model | Shape |
|---|---|
| HCl | Linear |
| BeCl2 | Linear |
| H2O | Bent |
| BH3 | Trigonal planar |
| NH3 | Pyramidal |
| CH4 | Tetrahedral |
| PCl5 | Trigonal bipyramidal |
| SF6 | Octahedral |
| Lone pairs | Brown spheres or brown pear-shaped parts |
| Extra parts | 2 pear-shaped parts for protonated models such as H3O+ |
| Coordination numbers | 1 to 6 |
How the model set is used in teaching
Valence shell electron pair repulsion (VSEPR) theory says that the electron pairs around a central atom push each other as far apart as possible. Two pairs give a linear shape (180 degrees), three a trigonal plane (120 degrees), four a tetrahedron (109.5 degrees), five a trigonal bipyramid and six an octahedron. The eight models follow this sequence, so students can see each geometry and estimate its bond angles.
Lone pairs are shown with brown spheres or brown pear-shaped parts. Comparing CH4, NH3 and H2O, which all have four electron pairs around the central atom, shows how swapping bonding pairs for lone pairs changes the shape from tetrahedral to pyramidal to bent and squeezes the bond angle.
The two extra pear-shaped parts let students protonate a model, for example turning water into the hydronium ion H3O+, which links molecular shape to acid-base chemistry.
Key features
- Eight example molecules covering coordination numbers 1 to 6
- Linear, bent, trigonal planar, pyramidal, tetrahedral, trigonal bipyramidal and octahedral geometries
- Brown spheres and pear-shaped parts that mark lone pairs
- Two extra pear-shaped parts for protonated models such as H3O+
- Suits VSEPR, bond angle and acid-base lessons
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the Shapes of Molecules Set at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Molecular Model products
- Organic and Inorganic Set - Student (EL-MM-11007)
- Biochemistry Set - Student (EL-MM-11009)
- Equal Mass Metal Cylinders Set (EL-MM-11006)
- Carbon Nanotubes (EL-MM-11010)
- Atomic Orbital Set (EL-MM-11005)
- Mole Set (EL-MM-11011)
The full range is in the Molecular Model section of the Chemistry Lab range.
Frequently asked questions
Which molecules does the Shapes of Molecules Set build?
HCl and BeCl2 (linear), H2O (bent), BH3 (trigonal planar), NH3 (pyramidal), CH4 (tetrahedral), PCl5 (trigonal bipyramidal) and SF6 (octahedral).
How are lone pairs shown?
By brown spheres or brown pear-shaped parts, so lone pairs are easy to tell apart from bonds to other atoms.
What is the price of the Shapes of Molecules Set?
Prices are not published on the website. Add the Shapes of Molecules Set to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-MM-11008 and the quantity, to receive a quotation.
Does Lab Exports manufacture the Shapes of Molecules Set?
Yes. Lab Exports manufactures the Shapes of Molecules Set at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-MM-11008.
Request a quote
Email [email protected] with the house code EL-MM-11008 and the quantity, or add the Shapes of Molecules Set to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.