The 3D model of "atomic weight "and "atomic size" |
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| PURPOSE |
These models are effective when teaching the atomic weight and atomic size. |
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| TARGET |
| Junior high school Students (8th Grade) |
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| HOW TO MAKE |
| All parts are shown in Fig.1 |
| (1) Styrofoam ball (as shown in Table.1） |
| (2) Lead plate |
| (3) Neodymium magnet (One model needs two.) |
| (4) Metal washer (One model needs two.) |
| (5) Electron configuration |
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 Table.1 |
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 Fig.1 |
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| Production process |
| (1) Cut a Styrofoam ball to half. |
| (2) Gouge the center of the Styrofoam ball out. (Fig.2) |
| (3) Measure total mass of the atom to make. (Fig.1 ①～④ and Fig.3) Make total mass a quantity same as atomic weight. When total mass is not same as atomic weight, add lead plates or gouge the Styrofoam ball out. |
| (4) Bend a lead plate and put it in the Styrofoam ball.(Fig.4) |
| (5) Buries neodymium magnet in the Styrofoam ball. (Fig.4) |
| (6) Put electron configuration (Fig.1 ⑤) on the Styrofoam ball. (Fig.5) |
| (7) Attach metal washers to another half Styrofoam ball. The place is same as neodymium magnets. (Fig.6) |
| (8) Put two half Styrofoam ball together, and measure total mass. (Fig.7,8) |
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 Fig.2 |
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 Fig.3 |
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 Fig.4 |
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 Fig.5 |
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 Fig.6 |
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 Fig.7 |
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 Fig.8 |
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| HOW TO USE Arrange the 3D model according to mass small |
|  Fig.9 |
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| The 3D model materials lined up on the periodic table. |
