Trends in the Periodic Table
Purpose
Determine the trends, if they exist, for atomic size and ionization energy in the Periodic Table.
Materials
Graph paper or Excel spreadsheet
Procedure
1. Use the information from the section of the periodic table. Be sure to give each graph a title
and to label each axis.
2. For elements 3-20, make a graph of atomic radius as a function of atomic number. Plot atomic
number on the X axis and atomic radius on the Y-axis.
3. For elements 3-20, make a graph of ionization energy as a function of atomic number. Plot
atomic number on the X-axis and ionization energy on the Y-axis.
4. For elements in Family 1A (1) and Family 2A (2), graph Atomic Radius vs. period number. Use a
different color or symbol for each line. Plot Period number on the X-axis and atomic radius on
the Y-axis.
5. For elements in Family 1(1A) and Family 2 (2A), graph ionization energy vs period number. Use
a different color or symbol for each line. Plot ionization energy on the Y-axis and period number
on the X-axis.
Table 1 Partial Periodic Table with values
IA (1) IIA (2) IIIA (13) IVA (14) VA (15) VIA (16) VIIA (17) VIIIA (18)
3 4 5 6 7 8 9 10
2 Li Be B C N O F Ne
1.23 0.89 0.80 0.77 0.70 0.66 0.64 0.67
124 215 191 260 335 314 402 497
11 12 13 14 15 16 17 18
3 Na Mg Al Si P S Cl Ar
1.57 1.36 1.25 1.17 1.10 1.04 0.99 0.98
119 176 138 188 242 239 299 363
19 20
4 K Ca
2.03 1.74
100 141
37 38 8 Atomic number
5 Rb Sr O Symbol
2.16 1.91 0.66 Atomic radius
96 131 314 Ionization energy
, IA (1) IIA (2) IIIA (13) IVA (14) VA (15) VIA (16) VIIA (17) VIIIA (18)
55 56
6 Cs Ba
2.35 1.98
90 120
Purpose
Determine the trends, if they exist, for atomic size and ionization energy in the Periodic Table.
Materials
Graph paper or Excel spreadsheet
Procedure
1. Use the information from the section of the periodic table. Be sure to give each graph a title
and to label each axis.
2. For elements 3-20, make a graph of atomic radius as a function of atomic number. Plot atomic
number on the X axis and atomic radius on the Y-axis.
3. For elements 3-20, make a graph of ionization energy as a function of atomic number. Plot
atomic number on the X-axis and ionization energy on the Y-axis.
4. For elements in Family 1A (1) and Family 2A (2), graph Atomic Radius vs. period number. Use a
different color or symbol for each line. Plot Period number on the X-axis and atomic radius on
the Y-axis.
5. For elements in Family 1(1A) and Family 2 (2A), graph ionization energy vs period number. Use
a different color or symbol for each line. Plot ionization energy on the Y-axis and period number
on the X-axis.
Table 1 Partial Periodic Table with values
IA (1) IIA (2) IIIA (13) IVA (14) VA (15) VIA (16) VIIA (17) VIIIA (18)
3 4 5 6 7 8 9 10
2 Li Be B C N O F Ne
1.23 0.89 0.80 0.77 0.70 0.66 0.64 0.67
124 215 191 260 335 314 402 497
11 12 13 14 15 16 17 18
3 Na Mg Al Si P S Cl Ar
1.57 1.36 1.25 1.17 1.10 1.04 0.99 0.98
119 176 138 188 242 239 299 363
19 20
4 K Ca
2.03 1.74
100 141
37 38 8 Atomic number
5 Rb Sr O Symbol
2.16 1.91 0.66 Atomic radius
96 131 314 Ionization energy
, IA (1) IIA (2) IIIA (13) IVA (14) VA (15) VIA (16) VIIA (17) VIIIA (18)
55 56
6 Cs Ba
2.35 1.98
90 120
