Graph of atomic radius vs. atomic number
1. Connect the circles from atomic number 1
(hydrogen) to atomic number 54 (xenon) using a
pencil
2. Using a different color for each group, fill in the
circles that represent the members of the
following families:



3.
Group 1 (alkali metals)
Group 2 (alkaline earth metals)
Group 13 (boron group)
▪ Group 14 (carbon group)
▪ Group 17 (halogens)
▪ Group 18 (noble gases)
Draw lines between circles of the same color
(elements in the same family or group)
1.
Does atomic radius appear to be a periodic
property? Explain.
2.
Which family has the largest atomic radii
within any given period? Which family has the
smallest radius?
3.
In general, what happens to atomic radius as
you proceed through a period (row) from the
alkali metals to the noble gases? Explain why
this might be so in terms of the attractive
force between the nucleus and electrons.