Subject: STEM
Grade: 9 A, B, C, D
Atomic Radius
Book reference: P. 402-406
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Exercise1:
Figure 1 shows the atomic radii for representative elements of groups 1A-7A and periods 3-6.
Study it carefully to do exercise.
Fig. 1 Atomic radii of the representative elements measured in picometers.
1- Open an Excel sheet.
2- For group 1 elements: make a 3-coloumn table including the elements’ symbols, atomic
numbers, and atomic radii.
3- Draw a line chart, a scatter chart, or a bubble chart to show the trend.
4- Repeat steps 1 and 2 for the second period: Li, Ba,….F.
5- Write your conclusion about the trend in atomic radius.
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5- Explain your finding.
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Extension:
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At home, draw the atomic number vs. radius for group 2 and period 3.
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