Subject: STEM Grade: 9 A, B, C, D Atomic Radius Book reference: P. 402-406 Name: ---------------------------------------------- Date: / / 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. ________________________________________________________________________________ ________________________________________________________________________________ 5- Explain your finding. ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ Extension: - At home, draw the atomic number vs. radius for group 2 and period 3. 09/01/2019 Page 1