SCH 3UI
Analysis of Periodic Table Trends Assignment…9 Questions
Name: ________________________________
DUE Date: __________________
*Complete the assignment independently using Excel to construct the graphs. Remember to include your name in the
graph’s title, as proof you completed the computer portion, ie Graph A Atomic number vs Atomic Radius (Susie Snow)
1. Create 2 separate line graphs as follows;
Graph A Atomic number vs
Atomic radius
-Plot a graph with atomic number
on the x-axis and atomic radius on
the y-axis for the 20 elements
presented in the table.
Graph B Atomic number vs
Ionization Energy
-Plot a graph with atomic number
on the x-axis and ionization energy
on the y-axis. Graph the first and
second ionization energy on the
graph in two different colours.
*For each graph connect
successive dots with straight lines.
Atomic
#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Element
Symbol
Atomic
Radius (pm)
First
Ionization
Energy
(kJ/mol)
Second
Ionization
Energy
(kJ/mol)
32
31
123
90
82
77
75
73
72
71
154
136
118
111
106
102
99
98
203
174
1312
2372
520
899
801
1086
1402
1314
1681
2081
496
738
578
786
1012
1000
1251
1521
419
590
N/A
5250
7298
1757
2427
2352
2856
3388
3374
3952
4562
1450
1816
1577
1907
2252
2298
2665
3052
1145
2. Examine Graph A
a) Which elements are found
at the peaks on your
graph? Label them ON the graph. What do these elements have in common?
b) Which elements are found at the valleys on this graph? Label them ON the graph. What do these
elements have in common?
3. Examine Graph B
a) Which elements are found at the peaks (1st and 2nd IE) on your graph? Label them ON the graph. What
do these elements have in common?
b) Which elements are found at the valleys (1st and 2nd IE) on this graph? Label them ON the graph. What
do these elements have in common?
4. In general, how are atomic radii and ionization energy related with respect to groups and periods on the
periodic table? Analyze your answers for questions 2 and 3.
5. a) What can you conclude with respect to first and second ionization energies with respect to each other?
b) Is the pattern of first ionization energy and atomic radii the same for second ionization energy and atomic
radii? Explain why or why not.
6. a) Why is there not a value of second ionization energy for hydrogen?
b) Which element does not have a third ionization energy?
7. Define the following terms and write a chemical equation using Oxygen to illustrate the term. HINT: Think
about what is being lost or gained and what the overall charge on oxygen will be.
a) First ionization energy
b) Second ionization energy
c) Electron affinity
8. a) Define electronegativity
b) Where on the periodic table is electronegativity the highest? Explain why this is so.
9. Given the following elements, rank them with respect to position on the periodic table according to…
Barium, Magnesium, Lithium, Oxygen and Fluorine
a) Increasing electron affinity
b) Decreasing electronegativity
BONUS: Which trend is this picture referring to?