- Plot the data points for Group 2A: (4, 1.11), (12, 1.60), (20, 1.97), (38, 2.15), (56, 2.17) on the first graph.
- Connect the plotted points with a line to show the trend of increasing atomic radius down the group.
- Plot the data points for Period 3: (11, 1.86), (12, 1.60), (13, 1.43), (14, 1.17), (15, 1.10), (16, 1.04), (17, 0.99), (18, 0.94) on the second graph.
- Connect the plotted points with a line to show the trend of decreasing atomic radius across the period.
- Label both graphs clearly with titles and axes.
- Observe that atomic radius increases down a group due to addition of electron shells and decreases across a period due to increased nuclear charge pulling electrons closer.
Parent Tip: Review the logic above to help your child master the concept of chemistry graphing practice.
